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Rifapentine: Drug information

Rifapentine: Drug information
(For additional information see "Rifapentine: Patient drug information" and see "Rifapentine: Pediatric drug information")

For abbreviations, symbols, and age group definitions used in Lexicomp (show table)
Brand Names: US
  • Priftin
Pharmacologic Category
  • Antitubercular Agent;
  • Rifamycin
Dosing: Adult
Leprosy, postexposure prophylaxis

Leprosy, postexposure prophylaxis (household contacts) (off-label use):

Note: For persons living in the same house as a patient with leprosy for a cumulative total of 6 months within the period from 6 years before diagnosis to 1 month after initiation of drug therapy in the patient (Wang 2023).

Oral: 600 mg as a single dose (Wang 2023).

Tuberculosis disease [active tuberculosis]

Tuberculosis disease [active tuberculosis] (drug-susceptible):

4-month rifapentine-moxifloxacin-based regimen:

Note: Reserve use for patients ≥40 kg with pulmonary tuberculosis (TB) who are not pregnant or breastfeeding; for patients with HIV infection, only use if CD4 count ≥100 cells/mm3 and in patients on an efavirenz-based antiretroviral regimen (CDC [Carr 2022]; Dorman 2021). In the clinical study evaluating this regimen, ≥5 doses per week were given by directly observed therapy (DOT) (Dorman 2021).

Initial phase: Oral: 1.2 g once daily in combination with moxifloxacin, isoniazid, and pyrazinamide for 8 weeks (56 doses) (CDC [Carr 2022]; Dorman 2021).

Continuation phase: Oral: 1.2 g once daily in combination with moxifloxacin and isoniazid for 9 weeks (63 doses) (CDC [Carr 2022]; Dorman 2021).

6-month regimen:

Initial phase: Oral: 600 mg twice weekly (with an interval ≥72 hours between doses) by DOT for 2 months as part of an appropriate combination regimen.

Continuation phase: Oral: 600 mg once weekly by DOT for 4 months in combination with isoniazid. Note: Drug-susceptible TB guidelines recommend against once-weekly therapy; use should only be considered in rare situations in certain HIV-uninfected individuals with no cavitation on chest x-ray (AST/CDC/IDSA [Nahid 2016]).

Tuberculosis infection [latent tuberculosis]

Tuberculosis infection [latent tuberculosis]:

Note: Administer for 3 months in combination with isoniazid. May be administered by DOT (preferred) or as self-administered therapy. This regimen may only be used in patients who are not pregnant and/or not expecting to become pregnant; if used in HIV-infected patients, it may only be used in those receiving antiretroviral therapy with acceptable drug-drug interactions with rifapentine (CDC [Borisov 2018]; NTCA/CDC [Sterling 2020]).

25.1 to 32 kg: Oral: 600 mg once weekly (NTCA/CDC [Sterling 2020]).

32.1 to 49.9 kg: Oral: 750 mg once weekly (NTCA/CDC [Sterling 2020]).

≥50 kg: Oral: 900 mg once weekly (NTCA/CDC [Sterling 2020]).

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Dosing: Kidney Impairment: Adult

There are no dosage adjustments provided in the manufacturer’s labeling (has not been studied).

Dosing: Hepatic Impairment: Adult

There are no dosage adjustments provided in the manufacturer’s labeling; use with caution. Pharmacokinetics in varying degrees of hepatic impairment were similar to those in healthy volunteers.

Dosing: Older Adult

Refer to adult dosing.

Dosing: Pediatric

(For additional information see "Rifapentine: Pediatric drug information")

Tuberculosis, active pulmonary infection; treatment

Tuberculosis, active (drug susceptible) pulmonary infection; treatment:

Four-month regimen:

Children ≥12 years and Adolescents, weighing ≥40 kg: Oral: 1,200 mg once daily for 17 weeks (119 total doses). Use in combination with moxifloxacin, isoniazid, and pyrazinamide; see guidelines for regimen details (CDC [Carr 2022]; Dorman 2021; WHO 2022). Note: At least 5 of the 7 weekly doses are recommended to be administered via directly observed therapy (DOT) (CDC [Carr 2022]).

Six-month regimen:

Children ≥12 years and Adolescents:

Initial phase: Oral: 600 mg twice weekly (with an interval ≥72 hours between doses) by DOT for 2 months as part of an appropriate combination regimen.

Continuation phase: Oral: 600 mg once weekly by DOT for 4 months as part of an appropriate combination regimen. Note: Drug-susceptible TB guidelines recommend against once-weekly therapy; use should only be considered in rare situations in certain HIV-uninfected individuals with no cavitation on chest x-ray (ATS/CDC/IDSA [Nahid 2016]).

Tuberculosis, latent infection

Tuberculosis, latent infection (LTBI):

Children ≥2 years and Adolescents:

Note: Administer the following weight-banded dosing by DOT or self-administered therapy (SAT) at the clinician's discretion based on local practice, patient attributes/preferences, and other factors including risk for TB disease progression (CDC [Borisov 2018]; NTCA/CDC [Sterling 2020]; manufacturer's labeling).

10 to 14 kg: Oral: 300 mg once weekly for 12 weeks in combination with isoniazid.

>14 to 25 kg: Oral: 450 mg once weekly for 12 weeks in combination with isoniazid.

>25 to 32 kg: Oral: 600 mg once weekly for 12 weeks in combination with isoniazid.

>32 to 50 kg: Oral: 750 mg once weekly for 12 weeks in combination with isoniazid.

>50 kg: Oral: 900 mg once weekly for 12 weeks in combination with isoniazid.

Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.

Dosing: Kidney Impairment: Pediatric

There are no dosage adjustments provided in the manufacturer’s labeling; has not been studied.

Dosing: Hepatic Impairment: Pediatric

There are no dosage adjustments provided in the manufacturer's labeling; in patients with liver disease or abnormal liver function tests, only use rifapentine when absolutely necessary and under strict medical supervision. Pharmacokinetics in adult patients with varying degrees of hepatic impairment were similar to those in healthy volunteers (Keung 1998).

Adverse Reactions

The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified. Frequency may vary based on treatment phase; adverse reaction data is based on rifapentine combination therapy.

>10%: Hematologic & oncologic: Anemia (≤11%), lymphocytopenia (3% to 11%)

1% to 10%:

Dermatologic: Diaphoresis (2% to 5%), maculopapular rash (2%), pruritus (≤3%), skin rash (3% to 4%)

Gastrointestinal: Abdominal pain (≤1%), anorexia (3% to 4%), diarrhea (≤1%), dyspepsia (≤2%), nausea (≤2%), vomiting (≤2%)

Genitourinary: Uremia (1% to 3%)

Hematologic & oncologic: Leukocytosis (2%), lymphadenopathy (≤1%), neutropenia (≤9%), thrombocythemia (≤6%), thrombocytopenia (1% to 2%)

Hepatic: Increased serum alanine aminotransferase (2% to 5%), increased serum aspartate aminotransferase (2% to 4%)

Hypersensitivity: Hypersensitivity reaction (4%)

Nervous system: Dizziness (≤1%), headache (≤3%)

Neuromuscular & skeletal: Arthralgia (≤4%), back pain (≤4%)

Ophthalmic: Conjunctivitis (≤2%)

Respiratory: Cough (3% to 6%), hemoptysis (2% to 8%)

Miscellaneous: Fever (≤1%)

<1%:

Cardiovascular: Chest pain, facial edema, orthostatic hypotension, palpitations, pericarditis, syncope, tachycardia, thrombosis

Dermatologic: Skin discoloration, urticaria

Endocrine & metabolic: Gout, hyperglycemia, hyperkalemia, hyperlipidemia

Gastrointestinal: Constipation, decreased appetite, enlargement of salivary glands, esophagitis, gastritis, pancreatitis, xerostomia

Genitourinary: Azotemia, leukorrhea, vaginal hemorrhage, vaginitis, vulvovaginal candidiasis, vulvovaginal pruritus

Hematologic & oncologic: Hematoma, leukopenia, lymphocytosis, purpuric disease

Hepatic: Hepatitis, hepatomegaly, hepatotoxicity, hyperbilirubinemia, increased serum alkaline phosphatase, jaundice

Infection: Fungal infection, viral infection

Nervous system: Anxiety, chills, confusion, depression, disorientation, drowsiness, fatigue, jitteriness, paresthesia, peripheral neuropathy, seizure, suicidal ideation, voice disorder

Neuromuscular & skeletal: Asthenia, myalgia, myositis, rhabdomyolysis

Respiratory: Asthma, bronchospasm, dyspnea, epistaxis, laryngeal edema, laryngitis, oropharyngeal pain, pharyngitis, pneumonitis, pulmonary fibrosis

Postmarketing:

Dermatologic: Stevens-Johnson syndrome

Gastrointestinal: Clostridioides difficile associated diarrhea

Hypersensitivity: Anaphylaxis

Immunologic: Drug reaction with eosinophilia and systemic symptoms

Contraindications

Hypersensitivity to rifapentine, other rifamycins, or any component of the formulation

Warnings/Precautions

Concerns related to adverse effects:

• Dermatologic reactions: Cases of severe cutaneous adverse reactions (SCAR) such as Stevens-Johnson syndrome and drug reaction with eosinophilia and systemic symptoms syndrome have been reported. Discontinue treatment immediately and institute appropriate therapy if signs or symptoms of SCAR develop.

• Hypersensitivity reactions: Hypersensitivity reactions, including anaphylaxis, may occur. Discontinue therapy and administer supportive measures if hypersensitivity occurs.

• Superinfection: Prolonged use may result in fungal or bacterial superinfection, including C. difficile-associated diarrhea (CDAD) and pseudomembranous colitis; CDAD has been observed >2 months postantibiotic treatment.

Disease-related concerns:

• Hepatic impairment: Patients with abnormal liver tests and/or liver disease should only be given rifapentine when absolutely necessary and under strict medical supervision. Monitoring of liver function tests (eg, serum transaminases) should be carried out prior to therapy and then every 2 to 4 weeks during therapy. Combination therapy should be discontinued if ALT is ≥5 times the upper limit of normal (ULN) even in the absence of liver dysfunction symptoms or ≥3 times ULN in the presence of symptoms (CDC 2012).

• Porphyria: Use is not recommended in patients with porphyria; exacerbation is possible due to enzyme-inducing properties.

Special populations:

• HIV-seropositive patients: Rifapentine should not be used once weekly during the continuation phase of treatment in HIV-seropositive patients; a higher rate of failure and/or relapse with rifampin-resistant organisms has been reported.

Dosage form specific issues:

• Propylene glycol: Some dosage forms may contain propylene glycol; large amounts are potentially toxic and have been associated with hyperosmolality, lactic acidosis, seizures, and respiratory depression; use caution (AAP 1997; Zar 2007).

Other warnings/precautions:

• Appropriate use: Use with caution in patients with cavitary pulmonary lesions and/or positive sputum cultures after initial treatment phase and patients with bilateral pulmonary disease; higher relapse rates may occur in these patients.

• Compliance: Compliance with dosing regimen is absolutely necessary for successful drug therapy.

• Contact lenses: Remove soft contact lenses during therapy since permanent staining may occur.

• Red/orange discoloration: Urine, feces, saliva, sweat, tears, skin, teeth, tongue, and CSF may be discolored to red/orange. Advise patients with dentures that permanent staining of dentures may occur.

Warnings: Additional Pediatric Considerations

Some dosage forms may contain propylene glycol; in neonates large amounts of propylene glycol delivered orally, intravenously (eg, >3,000 mg/day), or topically have been associated with potentially fatal toxicities which can include metabolic acidosis, seizures, renal failure, and CNS depression; toxicities have also been reported in children and adults including hyperosmolality, lactic acidosis, seizures, and respiratory depression; use caution (AAP 1997; Shehab 2009).

Dosage Forms: US

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Tablet, Oral:

Priftin: 150 mg [contains disodium edta, fd&c blue #2 (indigo carm) aluminum lake]

Generic Equivalent Available: US

No

Pricing: US

Tablets (Priftin Oral)

150 mg (per each): $5.81

Disclaimer: A representative AWP (Average Wholesale Price) price or price range is provided as reference price only. A range is provided when more than one manufacturer's AWP price is available and uses the low and high price reported by the manufacturers to determine the range. The pricing data should be used for benchmarking purposes only, and as such should not be used alone to set or adjudicate any prices for reimbursement or purchasing functions or considered to be an exact price for a single product and/or manufacturer. Medi-Span expressly disclaims all warranties of any kind or nature, whether express or implied, and assumes no liability with respect to accuracy of price or price range data published in its solutions. In no event shall Medi-Span be liable for special, indirect, incidental, or consequential damages arising from use of price or price range data. Pricing data is updated monthly.

Administration: Adult

Oral: Administer with meals. For patients who cannot swallow tablets, the tablets may be crushed and added to a small amount of semi-solid food and consumed immediately.

Administration: Pediatric

Oral: Administer with meals; meal should be of modest fat (not high fat) (WHO 2022; manufacturer's labeling). For patients who cannot swallow tablets, the tablets may be crushed and added to a small amount of semi-solid food and consumed immediately.

Medication Guide and/or Vaccine Information Statement (VIS)

An FDA-approved patient medication guide, which is available with the product information and at https://www.accessdata.fda.gov/drugsatfda_docs/label/2020/021024s017s018lbl.pdf#page=28, must be dispensed with this medication.

Use: Labeled Indications

Tuberculosis disease (active tuberculosis): Treatment of pulmonary tuberculosis (TB) disease (active TB) caused by Mycobacterium tuberculosis in adults and children 12 years and older; must be used in combination with one or more antituberculosis drugs to which the isolate is susceptible.

Limitations of use: Rifapentine should not be used once weekly in the continuation phase regimen in combination with isoniazid in patients with HIV with pulmonary TB disease because of a higher rate of failure and/or relapse with rifampin-resistant organisms.

Tuberculosis infection (latent tuberculosis): Treatment of TB infection (latent TB) caused by Mycobacterium tuberculosis, in combination with isoniazid, in adults and children 2 years and older at high risk of progression to TB disease. To identify candidates for TB infection treatment, refer to Centers for Disease Control and Prevention (CDC) guidelines for current recommendations.

Limitations of use: Rifapentine in combination with isoniazid is not recommended for individuals presumed to be exposed to rifamycin- or isoniazid-resistant M. tuberculosis.

Use: Off-Label: Adult

Leprosy, postexposure prophylaxis

Medication Safety Issues
Sound-alike/look-alike issues:

Rifapentine may be confused with rifabutin, rifAMPin

Metabolism/Transport Effects

Induces CYP3A4 (moderate)

Drug Interactions

Note: Interacting drugs may not be individually listed below if they are part of a group interaction (eg, individual drugs within “CYP3A4 Inducers [Strong]” are NOT listed). For a complete list of drug interactions by individual drug name and detailed management recommendations, use the Lexicomp drug interactions program by clicking on the “Launch drug interactions program” link above.

Abemaciclib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Abemaciclib. Risk X: Avoid combination

Abiraterone Acetate: Rifapentine may decrease the serum concentration of Abiraterone Acetate. Risk C: Monitor therapy

Acalabrutinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Acalabrutinib. Risk C: Monitor therapy

ALfentanil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of ALfentanil. Management: If concomitant use of alfentanil and moderate CYP3A4 inducers is necessary, consider dosage increase of alfentanil until stable drug effects are achieved. Monitor patients for signs of opioid withdrawal. Risk D: Consider therapy modification

ALPRAZolam: CYP3A4 Inducers (Moderate) may decrease the serum concentration of ALPRAZolam. Risk C: Monitor therapy

Amitriptyline: Rifapentine may decrease serum concentrations of the active metabolite(s) of Amitriptyline. Specifically, concentrations of nortriptyline may be reduced. Rifapentine may decrease the serum concentration of Amitriptyline. Risk C: Monitor therapy

AmLODIPine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of AmLODIPine. Risk C: Monitor therapy

Antihepaciviral Combination Products: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Antihepaciviral Combination Products. Risk X: Avoid combination

Apremilast: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Apremilast. Risk C: Monitor therapy

Aprepitant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Aprepitant. Risk C: Monitor therapy

ARIPiprazole: CYP3A4 Inducers (Moderate) may decrease the serum concentration of ARIPiprazole. Risk C: Monitor therapy

ARIPiprazole Lauroxil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of ARIPiprazole Lauroxil. Risk C: Monitor therapy

Artemether and Lumefantrine: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Artemether and Lumefantrine. Specifically, concentrations of dihydroartemisinin (DHA), the active metabolite of artemether may be decreased. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Artemether and Lumefantrine. Risk C: Monitor therapy

Asunaprevir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Asunaprevir. Risk X: Avoid combination

Atazanavir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Atazanavir. Risk C: Monitor therapy

Atogepant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Atogepant. Management: For treatment of episodic migraine, the recommended dose of atogepant is 30 mg once daily or 60 mg once daily when combined with CYP3A4 inducers. When used for treatment of chronic migraine, use of atogepant with CYP3A4 inducers should be avoided. Risk D: Consider therapy modification

Atorvastatin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Atorvastatin. Risk C: Monitor therapy

Avacopan: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Avacopan. Risk X: Avoid combination

Avanafil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Avanafil. Risk X: Avoid combination

Avapritinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Avapritinib. Risk X: Avoid combination

Axitinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Axitinib. Risk X: Avoid combination

Bacillus clausii: Antibiotics may diminish the therapeutic effect of Bacillus clausii. Management: Bacillus clausii should be taken in between antibiotic doses during concomitant therapy. Risk D: Consider therapy modification

BCG (Intravesical): Antibiotics may diminish the therapeutic effect of BCG (Intravesical). Risk X: Avoid combination

BCG Vaccine (Immunization): Antibiotics may diminish the therapeutic effect of BCG Vaccine (Immunization). Risk C: Monitor therapy

Bedaquiline: CYP3A4 Inducers (Moderate) may increase serum concentrations of the active metabolite(s) of Bedaquiline. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Bedaquiline. Risk X: Avoid combination

Belumosudil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Belumosudil. Risk C: Monitor therapy

Benzhydrocodone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Benzhydrocodone. Specifically, the serum concentrations of hydrocodone may be reduced. Risk C: Monitor therapy

Bictegravir: Rifapentine may decrease the serum concentration of Bictegravir. Risk X: Avoid combination

Bortezomib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Bortezomib. Risk C: Monitor therapy

Bosutinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Bosutinib. Risk C: Monitor therapy

Brexpiprazole: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Brexpiprazole. Risk C: Monitor therapy

Brigatinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Brigatinib. Management: Avoid concurrent use of brigatinib with moderate CYP3A4 inducers when possible. If combined, increase the daily dose of brigatinib in 30 mg increments after 7 days of treatment with the current brigatinib dose, up to maximum of twice the dose. Risk D: Consider therapy modification

Buprenorphine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Buprenorphine. Risk C: Monitor therapy

BusPIRone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of BusPIRone. Risk C: Monitor therapy

Cabotegravir: Rifapentine may decrease the serum concentration of Cabotegravir. Risk X: Avoid combination

Cabozantinib: Rifapentine may decrease the serum concentration of Cabozantinib. Risk C: Monitor therapy

Cannabis: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Cannabis. More specifically, tetrahydrocannabinol and cannabidiol serum concentrations may be decreased. Risk C: Monitor therapy

Capivasertib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Capivasertib. Risk X: Avoid combination

Capmatinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Capmatinib. Risk X: Avoid combination

CarBAMazepine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of CarBAMazepine. Risk C: Monitor therapy

Cariprazine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Cariprazine. Risk X: Avoid combination

Ceritinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ceritinib. Risk C: Monitor therapy

Cholera Vaccine: Antibiotics may diminish the therapeutic effect of Cholera Vaccine. Management: Avoid cholera vaccine in patients receiving systemic antibiotics, and within 14 days following the use of oral or parenteral antibiotics. Risk X: Avoid combination

Clarithromycin: CYP3A4 Inducers (Moderate) may increase serum concentrations of the active metabolite(s) of Clarithromycin. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Clarithromycin. Management: Consider alternative antimicrobial therapy for patients receiving a CYP3A4 inducer. Drugs that enhance the metabolism of clarithromycin into 14-hydroxyclarithromycin may alter the clinical activity of clarithromycin and impair its efficacy. Risk D: Consider therapy modification

Clindamycin (Systemic): CYP3A4 Inducers (Moderate) may decrease the serum concentration of Clindamycin (Systemic). Risk C: Monitor therapy

CloZAPine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of CloZAPine. Risk C: Monitor therapy

Cobicistat: Rifapentine may decrease the serum concentration of Cobicistat. Risk X: Avoid combination

Cobimetinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Cobimetinib. Risk X: Avoid combination

Codeine: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Codeine. Risk C: Monitor therapy

Copanlisib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Copanlisib. Risk C: Monitor therapy

Crizotinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Crizotinib. Risk C: Monitor therapy

CycloSPORINE (Systemic): CYP3A4 Inducers (Moderate) may decrease the serum concentration of CycloSPORINE (Systemic). Risk C: Monitor therapy

CYP2C9 Substrates (High risk with Inducers): Rifapentine may decrease the serum concentration of CYP2C9 Substrates (High risk with Inducers). Risk C: Monitor therapy

Daclatasvir: Rifapentine may decrease the serum concentration of Daclatasvir. Management: US labeling recommends increasing the daclatasvir dose to 90 mg once daily if used with rifapentine. Canadian labeling states that the combination of daclatasvir and rifapentine is contraindicated. Risk D: Consider therapy modification

Dapsone (Systemic): CYP3A4 Inducers (Moderate) may decrease the serum concentration of Dapsone (Systemic). Risk C: Monitor therapy

Daridorexant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Daridorexant. Risk X: Avoid combination

Darunavir: Rifapentine may decrease the serum concentration of Darunavir. Risk X: Avoid combination

Dasabuvir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Dasabuvir. Risk X: Avoid combination

Dasatinib: CYP3A4 Inducers (Moderate) may increase the serum concentration of Dasatinib. Risk C: Monitor therapy

Deflazacort: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Deflazacort. Risk X: Avoid combination

Delavirdine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Delavirdine. Risk C: Monitor therapy

DexAMETHasone (Systemic): CYP3A4 Inducers (Moderate) may decrease the serum concentration of DexAMETHasone (Systemic). Risk C: Monitor therapy

DiazePAM: CYP3A4 Inducers (Moderate) may decrease the serum concentration of DiazePAM. Risk C: Monitor therapy

Dienogest: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Dienogest. Risk C: Monitor therapy

DilTIAZem: CYP3A4 Inducers (Moderate) may decrease the serum concentration of DilTIAZem. Risk C: Monitor therapy

Disopyramide: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Disopyramide. Risk C: Monitor therapy

Dolutegravir: May enhance the adverse/toxic effect of Rifapentine. Rifapentine may decrease the serum concentration of Dolutegravir. Risk C: Monitor therapy

Doravirine: Rifapentine may decrease the serum concentration of Doravirine. Risk X: Avoid combination

DOXOrubicin (Conventional): CYP3A4 Inducers (Moderate) may decrease the serum concentration of DOXOrubicin (Conventional). Risk X: Avoid combination

DroNABinol: CYP3A4 Inducers (Moderate) may decrease the serum concentration of DroNABinol. Risk C: Monitor therapy

Dronedarone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Dronedarone. Risk C: Monitor therapy

Duvelisib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Duvelisib. Management: Avoid if possible. If used, on day 12 of combination increase duvelisib from 25 mg twice daily to 40 mg twice daily or from 15 mg twice daily to 25 mg twice daily. Resume prior duvelisib dose 14 days after stopping moderate CYP3A4 inducer. Risk D: Consider therapy modification

Dydrogesterone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Dydrogesterone. Risk C: Monitor therapy

Efavirenz: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Efavirenz. Risk C: Monitor therapy

Elacestrant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Elacestrant. Risk X: Avoid combination

Elbasvir and Grazoprevir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Elbasvir and Grazoprevir. Risk X: Avoid combination

Elexacaftor, Tezacaftor, and Ivacaftor: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Elexacaftor, Tezacaftor, and Ivacaftor. Risk C: Monitor therapy

Eliglustat: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Eliglustat. Risk C: Monitor therapy

Elvitegravir: Rifapentine may decrease the serum concentration of Elvitegravir. Risk X: Avoid combination

Encorafenib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Encorafenib. Risk C: Monitor therapy

Entrectinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Entrectinib. Risk X: Avoid combination

Erdafitinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Erdafitinib. Management: Dose modifications of erdafitinib may be required. See full monograph for details. Risk D: Consider therapy modification

Erlotinib: Rifapentine may decrease the serum concentration of Erlotinib. Management: Avoid concomitant use of erlotinib with rifapentine when possible. If such a combination cannot be avoided, consider increasing the erlotinib dose by 50 mg increments at 2 week intervals as tolerated, to a maximum of 450 mg/day. Risk D: Consider therapy modification

Estrogen Derivatives: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Estrogen Derivatives. Risk C: Monitor therapy

Etoposide: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Etoposide. Risk C: Monitor therapy

Etoposide Phosphate: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Etoposide Phosphate. Risk C: Monitor therapy

Etravirine: Rifapentine may decrease the serum concentration of Etravirine. Risk X: Avoid combination

Everolimus: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Everolimus. Risk C: Monitor therapy

Exemestane: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Exemestane. Risk C: Monitor therapy

Fecal Microbiota (Live) (Oral): May diminish the therapeutic effect of Antibiotics. Risk X: Avoid combination

Fecal Microbiota (Live) (Rectal): Antibiotics may diminish the therapeutic effect of Fecal Microbiota (Live) (Rectal). Risk X: Avoid combination

Fedratinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Fedratinib. Risk X: Avoid combination

Felodipine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Felodipine. Risk C: Monitor therapy

FentaNYL: CYP3A4 Inducers (Moderate) may decrease the serum concentration of FentaNYL. Risk C: Monitor therapy

Fexinidazole: CYP3A4 Inducers (Moderate) may increase serum concentrations of the active metabolite(s) of Fexinidazole. Risk X: Avoid combination

Finerenone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Finerenone. Risk X: Avoid combination

Flibanserin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Flibanserin. Risk X: Avoid combination

Fluconazole: Rifapentine may decrease the serum concentration of Fluconazole. Risk C: Monitor therapy

Fosamprenavir: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Fosamprenavir. Risk C: Monitor therapy

Fosaprepitant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Fosaprepitant. Specifically, CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite aprepitant. Risk C: Monitor therapy

Fosnetupitant: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Fosnetupitant. Risk C: Monitor therapy

Fostamatinib: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Fostamatinib. Risk C: Monitor therapy

Fruquintinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Fruquintinib. Management: Avoid this combination when possible. If combined, continue the same fruquintinib dose, but monitor for reduced fruquintinib efficacy. Risk D: Consider therapy modification

Ganaxolone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ganaxolone. Management: Avoid concomitant use of ganaxolone and moderate CYP3A4 inducers whenever possible. If combined, consider increasing the dose of ganaxolone, but do not exceed the maximum recommended daily dose. Risk D: Consider therapy modification

Gefitinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Gefitinib. Risk C: Monitor therapy

Gemigliptin: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Gemigliptin. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Gemigliptin. Risk C: Monitor therapy

Gepirone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Gepirone. Risk C: Monitor therapy

Glasdegib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Glasdegib. Management: Avoid use of glasdegib and moderate CYP3A4 inducers whenever possible. If combined, increase glasdegib dose from 100 mg daily to 200 mg daily or from 50 mg daily to 100 mg daily. Resume previous glasdegib dose 7 days after discontinuation of the inducer. Risk D: Consider therapy modification

Glecaprevir and Pibrentasvir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Glecaprevir and Pibrentasvir. Risk C: Monitor therapy

GuanFACINE: CYP3A4 Inducers (Moderate) may decrease the serum concentration of GuanFACINE. Management: Increase extended-release guanfacine dose by up to double when initiating guanfacine in patients taking CYP3A4 inducers or if initiating a CYP3A4 inducer in a patient already taking extended-release guanfacine. Monitor for reduced guanfacine efficacy. Risk D: Consider therapy modification

Hormonal Contraceptives: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Hormonal Contraceptives. Management: Advise patients to use an alternative method of contraception or a back-up method during coadministration, and to continue back-up contraception for 28 days after discontinuing a moderate CYP3A4 inducer to ensure contraceptive reliability. Risk D: Consider therapy modification

HYDROcodone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of HYDROcodone. Risk C: Monitor therapy

Hydrocortisone (Systemic): CYP3A4 Inducers (Moderate) may decrease the serum concentration of Hydrocortisone (Systemic). Risk C: Monitor therapy

Ibrexafungerp: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ibrexafungerp. Risk X: Avoid combination

Ibrutinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ibrutinib. Risk C: Monitor therapy

Idelalisib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Idelalisib. Risk C: Monitor therapy

Ifosfamide: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Ifosfamide. CYP3A4 Inducers (Moderate) may increase serum concentrations of the active metabolite(s) of Ifosfamide. Risk C: Monitor therapy

Imatinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Imatinib. Risk C: Monitor therapy

Immune Checkpoint Inhibitors (Anti-PD-1, -PD-L1, and -CTLA4 Therapies): Antibiotics may diminish the therapeutic effect of Immune Checkpoint Inhibitors (Anti-PD-1, -PD-L1, and -CTLA4 Therapies). Risk C: Monitor therapy

Indinavir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Indinavir. Management: Consider avoiding the combination of indinavir and moderate CYP3A4 inducers whenever possible due to the risk for decreased indinavir concentrations, reduced efficacy, and development of resistance. If combined, monitor for indinavir treatment failure. Risk D: Consider therapy modification

Infigratinib: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Infigratinib. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Infigratinib. Risk X: Avoid combination

Irinotecan Products: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Irinotecan Products. Specifically, concentrations of SN-38 may be reduced. Risk C: Monitor therapy

Isavuconazonium Sulfate: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Isavuconazonium Sulfate. Specifically, CYP3A4 Inducers (Moderate) may decrease isavuconazole serum concentrations. Risk C: Monitor therapy

Isradipine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Isradipine. Risk C: Monitor therapy

Istradefylline: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Istradefylline. Risk C: Monitor therapy

Itraconazole: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Itraconazole. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Itraconazole. Risk C: Monitor therapy

Ivabradine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ivabradine. Risk X: Avoid combination

Ivacaftor: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ivacaftor. Risk C: Monitor therapy

Ixabepilone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ixabepilone. Risk C: Monitor therapy

Ixazomib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ixazomib. Risk C: Monitor therapy

Ketamine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ketamine. Risk C: Monitor therapy

Ketoconazole (Systemic): CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ketoconazole (Systemic). Risk C: Monitor therapy

Lactobacillus and Estriol: Antibiotics may diminish the therapeutic effect of Lactobacillus and Estriol. Risk C: Monitor therapy

Lapatinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lapatinib. Risk C: Monitor therapy

Larotrectinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Larotrectinib. Management: Double the larotrectinib dose if used together with a moderate CYP3A4 inducer. Following discontinuation of the moderate CYP3A4 inducer, resume the previous dose of larotrectinib after a period of 3 to 5 times the inducer's half-life. Risk D: Consider therapy modification

Ledipasvir: Rifapentine may decrease the serum concentration of Ledipasvir. Risk X: Avoid combination

Lefamulin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lefamulin. Management: Avoid concomitant use of lefamulin with moderate CYP3A4 inducers unless the benefits outweigh the risks. Risk D: Consider therapy modification

Lefamulin (Intravenous): CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lefamulin (Intravenous). Management: Avoid concomitant use of lefamulin (intravenous) with moderate CYP3A4 inducers unless the benefits outweigh the risks. Risk D: Consider therapy modification

Lemborexant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lemborexant. Risk X: Avoid combination

Lenacapavir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lenacapavir. Risk X: Avoid combination

Leniolisib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Leniolisib. Risk X: Avoid combination

Lercanidipine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lercanidipine. Risk C: Monitor therapy

Levamlodipine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Levamlodipine. Risk C: Monitor therapy

Levoketoconazole: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Levoketoconazole. Risk C: Monitor therapy

Levomethadone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Levomethadone. Risk C: Monitor therapy

LinaGLIPtin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of LinaGLIPtin. Risk C: Monitor therapy

Lonafarnib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lonafarnib. Risk X: Avoid combination

Lopinavir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lopinavir. Risk C: Monitor therapy

Lorlatinib: CYP3A4 Inducers (Moderate) may enhance the hepatotoxic effect of Lorlatinib. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lorlatinib. Management: Avoid use of lorlatinib with moderate CYP3A4 inducers. If such a combination must be used, increase lorlatinib to 125 mg daily. Monitor for reduced lorlatinib efficacy and consider closer monitoring of AST, ALT, and bilirubin. Risk D: Consider therapy modification

Lovastatin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lovastatin. Risk C: Monitor therapy

Lumacaftor and Ivacaftor: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lumacaftor and Ivacaftor. Risk C: Monitor therapy

Lumateperone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lumateperone. Risk X: Avoid combination

Lurasidone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Lurasidone. Management: Monitor for decreased lurasidone effects if combined with moderate CYP3A4 inducers and consider increasing the lurasidone dose if coadministered with a moderate CYP3A4 inducer for 7 or more days. Risk D: Consider therapy modification

Macitentan: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Macitentan. Risk C: Monitor therapy

Maraviroc: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Maraviroc. Management: Increase maraviroc adult dose to 600 mg twice/day, but only if not receiving a strong CYP3A4 inhibitor. Not recommended for pediatric patients not also receiving a strong CYP3A4 inhibitor. Contraindicated in patients with CrCl less than 30 mL/min. Risk D: Consider therapy modification

Maribavir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Maribavir. Risk C: Monitor therapy

Mavacamten: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Mavacamten. Risk X: Avoid combination

Mefloquine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Mefloquine. Risk C: Monitor therapy

Meperidine: CYP3A4 Inducers (Moderate) may increase serum concentrations of the active metabolite(s) of Meperidine. Specifically, concentrations of normeperidine, the CNS stimulating metabolite, may be increased. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Meperidine. Risk C: Monitor therapy

Methadone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Methadone. Risk C: Monitor therapy

MethylPREDNISolone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of MethylPREDNISolone. Risk C: Monitor therapy

Mianserin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Mianserin. Risk C: Monitor therapy

Midazolam: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Midazolam. Risk C: Monitor therapy

Midostaurin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Midostaurin. Risk C: Monitor therapy

MiFEPRIStone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of MiFEPRIStone. Management: Avoid combined use in patients treated for Cushing's disease. When used for pregnancy termination, mifepristone efficacy may be reduced and an alternative pregnancy termination procedure may be warranted. Ensure a follow-up assessment after combined use. Risk D: Consider therapy modification

Mirodenafil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Mirodenafil. Risk C: Monitor therapy

Mitapivat: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Mitapivat. Management: Consider alternatives to this combination when possible. If combined, monitor hemoglobin and titrate mitapivat beyond 50 mg twice daily, if needed, but do not exceed doses of 100 mg twice daily. Risk D: Consider therapy modification

Mobocertinib: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Mobocertinib. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Mobocertinib. Risk X: Avoid combination

Naldemedine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Naldemedine. Risk C: Monitor therapy

Naloxegol: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Naloxegol. Risk C: Monitor therapy

Nelfinavir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Nelfinavir. Risk C: Monitor therapy

Neratinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Neratinib. Risk X: Avoid combination

Netupitant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Netupitant. Risk C: Monitor therapy

Nevirapine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Nevirapine. Risk C: Monitor therapy

NIFEdipine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of NIFEdipine. Risk C: Monitor therapy

Nilotinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Nilotinib. Risk C: Monitor therapy

Nilvadipine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Nilvadipine. Risk C: Monitor therapy

NiMODipine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of NiMODipine. Risk C: Monitor therapy

Nirmatrelvir and Ritonavir: Rifapentine may decrease the serum concentration of Nirmatrelvir and Ritonavir. Risk X: Avoid combination

Nirogacestat: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Nirogacestat. Risk X: Avoid combination

Nisoldipine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Nisoldipine. Risk X: Avoid combination

Nortriptyline: Rifapentine may decrease the serum concentration of Nortriptyline. Risk C: Monitor therapy

Olaparib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Olaparib. Risk X: Avoid combination

Oliceridine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Oliceridine. Risk C: Monitor therapy

Olmutinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Olmutinib. Risk C: Monitor therapy

Olutasidenib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Olutasidenib. Risk X: Avoid combination

Omaveloxolone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Omaveloxolone. Risk X: Avoid combination

Orelabrutinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Orelabrutinib. Risk X: Avoid combination

Osimertinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Osimertinib. Risk C: Monitor therapy

OxyCODONE: CYP3A4 Inducers (Moderate) may decrease the serum concentration of OxyCODONE. Risk C: Monitor therapy

PACLitaxel (Conventional): CYP3A4 Inducers (Moderate) may decrease the serum concentration of PACLitaxel (Conventional). Risk C: Monitor therapy

PACLitaxel (Protein Bound): CYP3A4 Inducers (Moderate) may decrease the serum concentration of PACLitaxel (Protein Bound). Risk C: Monitor therapy

Pacritinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Pacritinib. Risk X: Avoid combination

Palbociclib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Palbociclib. Risk C: Monitor therapy

Palovarotene: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Palovarotene. Risk X: Avoid combination

PAZOPanib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of PAZOPanib. Risk C: Monitor therapy

Pemigatinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Pemigatinib. Risk X: Avoid combination

Perampanel: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Perampanel. Management: Increase perampanel starting dose to 4 mg/day if used with moderate CYP3A4 inducers. Increase perampanel dose by 2 mg/day no more than once weekly based on response and tolerability. Dose adjustments may be needed if the inducer is discontinued. Risk D: Consider therapy modification

PHENobarbital: Rifapentine may decrease the serum concentration of PHENobarbital. Risk C: Monitor therapy

Pimavanserin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Pimavanserin. Risk X: Avoid combination

Piperaquine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Piperaquine. Risk C: Monitor therapy

Pirtobrutinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Pirtobrutinib. Management: Avoid concomitant use if possible. If combined, if the current pirtobrutinib dose is 200 mg once daily, increase to 300 mg once daily. If current pirtobrutinib dose is 50 mg or 100 mg once daily, increase the dose by 50 mg. Risk D: Consider therapy modification

PONATinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of PONATinib. Risk C: Monitor therapy

Pralsetinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Pralsetinib. Management: If this combo cannot be avoided, increase pralsetinib dose from 400 mg daily to 600 mg daily; from 300 mg daily to 500 mg daily; and from 200 mg daily to 300 mg daily. Risk D: Consider therapy modification

Praziquantel: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Praziquantel. Management: Consider alternatives to this combination whenever possible. If combined, monitor closely for reduced praziquantel efficacy. If possible, stop the moderate CYP3A4 inducer 2 to 4 weeks before praziquantel initiation. Risk D: Consider therapy modification

PrednisoLONE (Systemic): CYP3A4 Inducers (Moderate) may decrease the serum concentration of PrednisoLONE (Systemic). Risk C: Monitor therapy

PredniSONE: CYP3A4 Inducers (Moderate) may decrease the serum concentration of PredniSONE. Risk C: Monitor therapy

Pretomanid: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Pretomanid. Risk X: Avoid combination

Propranolol: Rifapentine may decrease the serum concentration of Propranolol. Risk C: Monitor therapy

QUEtiapine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of QUEtiapine. Risk C: Monitor therapy

QuiNIDine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of QuiNIDine. Risk C: Monitor therapy

QuiNINE: CYP3A4 Inducers (Moderate) may decrease the serum concentration of QuiNINE. Risk C: Monitor therapy

Quizartinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Quizartinib. Risk X: Avoid combination

Raltegravir: Rifapentine may increase the serum concentration of Raltegravir. Rifapentine may decrease the serum concentration of Raltegravir. Risk C: Monitor therapy

Ranolazine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ranolazine. Risk X: Avoid combination

Regorafenib: CYP3A4 Inducers (Moderate) may increase serum concentrations of the active metabolite(s) of Regorafenib. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Regorafenib. Risk C: Monitor therapy

Repaglinide: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Repaglinide. Risk C: Monitor therapy

Repotrectinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Repotrectinib. Risk X: Avoid combination

Ribociclib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ribociclib. Risk C: Monitor therapy

Rilpivirine: Rifapentine may decrease the serum concentration of Rilpivirine. Risk X: Avoid combination

Rimegepant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Rimegepant. Risk X: Avoid combination

Ripretinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ripretinib. Management: Avoid this combination if possible. If concomitant use is required, increase ripretinib to 150 mg twice daily. Decrease ripretinib to 150 mg once daily 14 days after stopping a moderate CYP3A4 inducer. Monitor patients for ripretinib response and toxicity Risk D: Consider therapy modification

RisperiDONE: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of RisperiDONE. CYP3A4 Inducers (Moderate) may decrease the serum concentration of RisperiDONE. Risk C: Monitor therapy

Ritlecitinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ritlecitinib. Risk C: Monitor therapy

Ritonavir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ritonavir. Risk C: Monitor therapy

Roflumilast (Systemic): CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Roflumilast (Systemic). CYP3A4 Inducers (Moderate) may decrease the serum concentration of Roflumilast (Systemic). Risk C: Monitor therapy

Rolapitant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Rolapitant. Risk C: Monitor therapy

Samidorphan: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Samidorphan. Risk C: Monitor therapy

Saquinavir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Saquinavir. Risk C: Monitor therapy

Selpercatinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Selpercatinib. Risk X: Avoid combination

Selumetinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Selumetinib. Risk X: Avoid combination

Sertraline: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Sertraline. Risk C: Monitor therapy

Sildenafil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Sildenafil. Risk C: Monitor therapy

Simeprevir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Simeprevir. Risk X: Avoid combination

Simvastatin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Simvastatin. Risk C: Monitor therapy

Sirolimus (Conventional): CYP3A4 Inducers (Moderate) may decrease the serum concentration of Sirolimus (Conventional). Risk C: Monitor therapy

Sirolimus (Protein Bound): CYP3A4 Inducers (Moderate) may decrease the serum concentration of Sirolimus (Protein Bound). Risk C: Monitor therapy

Sodium Picosulfate: Antibiotics may diminish the therapeutic effect of Sodium Picosulfate. Management: Consider using an alternative product for bowel cleansing prior to a colonoscopy in patients who have recently used or are concurrently using an antibiotic. Risk D: Consider therapy modification

Sofosbuvir: Rifapentine may decrease the serum concentration of Sofosbuvir. Risk X: Avoid combination

Sonidegib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Sonidegib. Risk X: Avoid combination

SORAfenib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of SORAfenib. Risk C: Monitor therapy

Sotorasib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Sotorasib. Risk C: Monitor therapy

Sparsentan: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Sparsentan. Risk C: Monitor therapy

SUFentanil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of SUFentanil. Risk C: Monitor therapy

SUNItinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of SUNItinib. Risk C: Monitor therapy

Suvorexant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Suvorexant. Risk C: Monitor therapy

Tacrolimus (Systemic): CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tacrolimus (Systemic). Risk C: Monitor therapy

Tadalafil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tadalafil. Risk C: Monitor therapy

Tamoxifen: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Tamoxifen. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tamoxifen. Risk C: Monitor therapy

Tasimelteon: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tasimelteon. Risk C: Monitor therapy

Tazemetostat: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tazemetostat. Risk X: Avoid combination

Temsirolimus: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Temsirolimus. Specifically, sirolimus concentrations may be decreased. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Temsirolimus. Risk C: Monitor therapy

Tenofovir Alafenamide: Rifapentine may decrease the serum concentration of Tenofovir Alafenamide. Risk X: Avoid combination

Tetrahydrocannabinol: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tetrahydrocannabinol. Risk C: Monitor therapy

Tetrahydrocannabinol and Cannabidiol: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tetrahydrocannabinol and Cannabidiol. Risk C: Monitor therapy

Tezacaftor and Ivacaftor: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tezacaftor and Ivacaftor. Risk C: Monitor therapy

Thiotepa: CYP3A4 Inducers (Moderate) may increase serum concentrations of the active metabolite(s) of Thiotepa. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Thiotepa. Risk C: Monitor therapy

Ticagrelor: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Ticagrelor. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ticagrelor. Risk C: Monitor therapy

Tivozanib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tivozanib. Risk C: Monitor therapy

Tofacitinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tofacitinib. Risk C: Monitor therapy

Tolvaptan: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tolvaptan. Risk C: Monitor therapy

Toremifene: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Toremifene. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Toremifene. Risk C: Monitor therapy

Trabectedin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Trabectedin. Risk C: Monitor therapy

TraMADol: CYP3A4 Inducers (Moderate) may decrease the serum concentration of TraMADol. Risk C: Monitor therapy

TraZODone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of TraZODone. Risk C: Monitor therapy

Triazolam: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Triazolam. Risk C: Monitor therapy

Tucatinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Tucatinib. Risk C: Monitor therapy

Typhoid Vaccine: Antibiotics may diminish the therapeutic effect of Typhoid Vaccine. Only the live attenuated Ty21a strain is affected. Management: Avoid use of live attenuated typhoid vaccine (Ty21a) in patients being treated with systemic antibacterial agents. Postpone vaccination until 3 days after cessation of antibiotics and avoid starting antibiotics within 3 days of last vaccine dose. Risk D: Consider therapy modification

Ubrogepant: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ubrogepant. Management: Use an initial ubrogepant dose of 100 mg and second dose (if needed) of 100 mg when used with a moderate CYP3A4 inducer. Risk D: Consider therapy modification

Ulipristal: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Ulipristal. Risk X: Avoid combination

Upadacitinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Upadacitinib. Risk C: Monitor therapy

Valbenazine: CYP3A4 Inducers (Moderate) may decrease serum concentrations of the active metabolite(s) of Valbenazine. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Valbenazine. Risk C: Monitor therapy

Vandetanib: CYP3A4 Inducers (Moderate) may increase serum concentrations of the active metabolite(s) of Vandetanib. CYP3A4 Inducers (Moderate) may decrease the serum concentration of Vandetanib. Risk C: Monitor therapy

Velpatasvir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Velpatasvir. Risk X: Avoid combination

Vemurafenib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Vemurafenib. Risk C: Monitor therapy

Venetoclax: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Venetoclax. Risk X: Avoid combination

Verapamil: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Verapamil. Risk C: Monitor therapy

Vilazodone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Vilazodone. Risk C: Monitor therapy

Vitamin K Antagonists (eg, warfarin): Rifamycin Derivatives may decrease the serum concentration of Vitamin K Antagonists. Management: Consider alternatives if possible. If combined, monitor for reduced anticoagulant effects if a rifamycin derivative is initiated in a vitamin K antagonist treated patient. Vitamin K antagonist dose adjustments will likely be required. Risk D: Consider therapy modification

Voclosporin: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Voclosporin. Risk X: Avoid combination

Vonoprazan: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Vonoprazan. Risk X: Avoid combination

Vorapaxar: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Vorapaxar. Risk X: Avoid combination

Voriconazole: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Voriconazole. Risk C: Monitor therapy

Vortioxetine: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Vortioxetine. Risk C: Monitor therapy

Voxelotor: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Voxelotor. Management: Avoid concomitant use of voxelotor and moderate CYP3A4 inducers. If unavoidable, increase the voxelotor dose to 2,000 mg once daily. For children ages 4 to less than 12 years, weight-based dose adjustments are required. See full monograph for details. Risk D: Consider therapy modification

Voxilaprevir: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Voxilaprevir. Risk X: Avoid combination

Zaleplon: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Zaleplon. Risk C: Monitor therapy

Zanubrutinib: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Zanubrutinib. Management: Avoid this combination if possible. If coadministration of zanubrutinib and a moderate CYP3A4 inducer is required, increase the zanubrutinib dose to 320 mg twice daily. Risk D: Consider therapy modification

Zolpidem: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Zolpidem. Risk C: Monitor therapy

Zopiclone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Zopiclone. Risk C: Monitor therapy

Zuranolone: CYP3A4 Inducers (Moderate) may decrease the serum concentration of Zuranolone. Risk X: Avoid combination

Food Interactions

High-fat meals increase AUC and maximum serum concentration by 40% to 50%. Management: Administer with meals.

Reproductive Considerations

Rifapentine may reduce the efficacy of hormonal contraceptives; nonhormonal contraception or the addition of a barrier method of contraception is recommended. Because rifapentine is not currently recommended for use during pregnancy, patients taking rifapentine should notify their healthcare provider if they wish to become pregnant (CDC [Borisov 2018]).

Pregnancy Considerations

Information related to the use of rifapentine during pregnancy is limited (Moro 2018). Rifapentine may increase the risk of maternal postpartum hemorrhage and neonatal bleeding when exposure occurs near delivery. Monitoring of the prothrombin time in the mother and neonate is recommended following exposure late in pregnancy; treatment with vitamin K may be needed.

Tuberculosis (TB) disease (active TB) is associated with adverse fetal outcomes, including intrauterine growth restriction, low birth weight, preterm birth, and perinatal death (Esmail 2018; Miele 2020), as well as adverse maternal outcomes, including increased risks for anemia and cesarean delivery. Placental transmission may rarely occur with active maternal disease (Miele 2020). Because information related to the use of rifapentine in pregnancy is limited, it is not currently recommended for use in pregnant patients (CDC [Borisov 2018]; WHO 2020).

Breastfeeding Considerations

It is not known if rifapentine is present in breast milk.

Rifapentine may discolor breast milk red-orange. According to the manufacturer, the decision to breastfeed during therapy should consider the risk of infant exposure, the benefits of breastfeeding to the infant, and the benefits of treatment to the mother. Infants exposed to rifapentine via breast milk should be monitored for signs of hepatotoxicity.

Dietary Considerations

Take with food.

Monitoring Parameters

Patients with preexisting hepatic problems should have liver function tests monitored (eg, serum transaminases) prior to therapy and then every 2 to 4 weeks during therapy. In treatment of latent infection with rifapentine and isoniazid combination therapy, patients with HIV infection, liver disorders, immediate postpartum (≤3 months after delivery), or regular ethanol use should have liver function (at least ALT) monitored prior to therapy and then at subsequent clinical visits whose baseline testing is abnormal or for others at risk for liver disease (CDC 2012).

Mechanism of Action

Inhibits DNA-dependent RNA polymerase in susceptible strains of Mycobacterium tuberculosis (MTB) (but not in mammalian cells). Rifapentine is bactericidal against both intracellular and extracellular MTB organisms.

Pharmacokinetics (Adult Data Unless Noted)

Note: Data suggest a similar pharmacokinetic profile between pediatric patients 12 to 15 years of age and adults.

Absorption:

High-fat meals increase AUC and Cmax by 40% to 50%

In pediatric patients, crushing the tablet results in 26% lower exposure than whole tablets.

Distribution: Vd: ~70 L

Protein binding: Rifapentine: ~98%, primarily to albumin; 25-desacetyl rifapentine: ~93%

Metabolism: Hepatic; hydrolyzed by an esterase enzyme to form the active metabolite 25-desacetyl rifapentine

Bioavailability: 70%

Half-life elimination: Rifapentine: ~17 hours; 25-desacetyl rifapentine: ~24 hours

Time to peak, serum: 3 to 10 hours

Excretion:

Feces (70%); urine (17%, primarily as metabolites)

In pediatric patients 2 to 18 years of age, clearance decreases with increasing age.

Brand Names: International
International Brand Names by Country
For country code abbreviations (show table)

  • (EE) Estonia: Priftin;
  • (HK) Hong Kong: Priftin;
  • (ID) Indonesia: Priftin;
  • (NO) Norway: Priftin;
  • (PT) Portugal: Priftin;
  • (RU) Russian Federation: Rifapex;
  • (TH) Thailand: Priftin;
  • (TW) Taiwan: Priftin;
  • (ZA) South Africa: Priftin
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