Version July 2025
The use of flibanserin and alcohol together close in time increases the risk of severe hypotension and syncope. Counsel patients to wait ≥2 hours after consuming 1 or 2 standard alcoholic drinks before taking flibanserin at bedtime or to skip their flibanserin dose if they have consumed ≥3 standard alcoholic drinks that evening.
The concomitant use of flibanserin and moderate or strong CYP3A4 inhibitors increases flibanserin concentrations, which can cause severe hypotension and syncope. Therefore, the use of moderate or strong CYP3A4 inhibitors is contraindicated in patients taking flibanserin.
The use of flibanserin in patients with hepatic impairment increases flibanserin concentrations, which can cause severe hypotension and syncope. Therefore, flibanserin is contraindicated in patients with hepatic impairment.
Hypoactive sexual desire disorder: Premenopausal patients: Oral: 100 mg once daily at bedtime; assess treatment efficacy at 8 weeks and discontinue if symptoms have not improved.
Missed dose: If a dose is missed, skip the missed dose and resume the normal dosing schedule at bedtime on the next day.
Dosage adjustment for concomitant therapy: Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.
There are no dosage adjustments provided in the manufacturer's labeling; however, dosage adjustments are unlikely to be required due to minimal change in AUC in patients with mild to severe renal impairment.
Use is contraindicated.
The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified. Reported adverse reactions are for adults.
>10%: Nervous system: Dizziness (11%), drowsiness (11%)
1% to 10%:
Dermatologic: Skin rash (1%)
Gastrointestinal: Abdominal pain (2%), constipation (2%), nausea (10%), xerostomia (2%)
Nervous system: Anxiety (2%), fatigue (9%), insomnia (5%), sedated state (1%), vertigo (1%)
<1%: Gastrointestinal: Appendicitis
Postmarketing:
Dermatologic: Pruritus, urticaria
Hypersensitivity: Anaphylaxis, angioedema, hypersensitivity reaction
Hypersensitivity (anaphylaxis, angioedema, pruritus, urticaria) to flibanserin or any component of the formulation; concomitant use with moderate or strong CYP3A4 inhibitors; hepatic impairment.
Significant drug interactions exist, requiring dose/frequency adjustment or avoidance. Consult drug interactions database for more information.
Canadian labeling: Additional contraindications (not in the US labeling): Patients with a resting systolic BP <110 mm Hg or diastolic BP <60 mm Hg in combination with alcohol; concomitant use with P-glycoprotein substrates (digoxin); pregnancy; breastfeeding.
Concerns related to adverse effects:
• CNS depression: May cause CNS depression, which may impair physical or mental abilities. Patients must be cautioned about performing tasks that require mental alertness (eg, operating machinery or driving); wait ≥6 hours before performing these tasks. The risk of CNS depression is increased with administration during waking hours, in patients with hepatic impairment, or with concomitant use of alcohol or other CNS depressants, or with medications that increase flibanserin concentrations (eg, CYP3A4 inhibitors).
• Hypersensitivity: Hypersensitivity reactions, including anaphylaxis, reactions consistent with angioedema (eg, swelling of face, lips, mouth), pruritus, and urticaria, have been reported. Discontinue use and initiate appropriate therapy if hypersensitivity reactions occur.
• Hypotension/syncope: Use may result in hypotension and syncope; the risk is increased with administration during waking hours or if higher than the recommended dose is taken. Use with caution in patients predisposed to hypotension. Patients who experience pre-syncope should immediately lie supine and seek medical help if the symptoms do not resolve; patients who experience syncope should seek prompt medical attention.
Disease-related concerns:
• Hepatic impairment: Use in patients with hepatic impairment results in increased flibanserin concentrations and a subsequent increased risk of severe hypotension and syncope.
Concurrent drug therapy issues:
• Alcohol: The use of flibanserin and alcohol together close in time increases the risk of severe hypotension and syncope. Counsel patients to wait ≥2 hours after consuming 1 or 2 standard alcoholic drinks before taking flibanserin at bedtime or to skip their flibanserin dose if they have consumed ≥3 standard alcoholic drinks that evening. One standard alcoholic drink contains 14 g pure alcohol and is equivalent to one 12 oz regular beer (5% alcohol), 5 oz wine (12% alcohol), or 1.4 oz of distilled spirits/shot (40% alcohol).
• CYP3A4 inhibitors: Concomitant use of moderate or strong CYP3A4 inhibitors results in increased flibanserin concentrations and subsequent increased risk of severe hypotension and syncope. If the patient requires treatment with a moderate or strong CYP3A4 inhibitor, discontinue flibanserin at least 2 days prior to the initiation of therapy. If the benefit of starting the CYP3A4 inhibitor outweighs the risk of hypotension and syncope, monitor the patient closely. Re-initiation of flibanserin should occur at least 2 weeks after the last dose of the CYP3A4 inhibitor. Concomitant use of multiple weak CYP3A4 inhibitors (eg, ginkgo, cimetidine) may increase the risk of hypotension and syncope; use with caution.
Special populations:
• CYP2C19 poor metabolizers: Use of flibanserin in patients who are CYP2C19 poor metabolizers results in increased flibanserin concentrations and may increase the risk of hypotension and syncope; monitor these patients closely for adverse reactions.
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Tablet, Oral:
Addyi: 100 mg
No
Tablets (Addyi Oral)
100 mg (per each): $37.96
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.
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Tablet, Oral:
Addyi: 100 mg
Administer orally once daily at bedtime
An FDA-approved patient medication guide, which is available with the product information and as follows, must be dispensed with this medication:
Addyi: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/022526s009lbl.pdf#page=23
Hypoactive sexual desire disorder: Treatment of premenopausal patients with acquired, generalized hypoactive sexual desire disorder (HSDD), as characterized by low sexual desire that causes marked distress or interpersonal difficulty and not due to a coexisting medical or psychiatric condition, problems within the relationship, or the effects of a medication or other drug substance.
Limitations of use: Flibanserin is not indicated for the treatment of HSDD in postmenopausal women or in men, or to enhance sexual performance.
Substrate of CYP1A2 (Minor), CYP2B6 (Minor), CYP2C19 (Major with inhibitors), CYP2C19 (Minor with inducers), CYP2C8 (Minor), CYP2C9 (Minor), CYP2D6 (Minor), CYP3A4 (Major); Note: Assignment of Major/Minor substrate status based on clinically relevant drug interaction potential; Inhibits P-glycoprotein;
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 drug interactions program by clicking on the “Launch drug interactions program” link above.
Acrivastine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Afatinib: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Afatinib. Management: If combined, administer the P-gp inhibitor simultaneously with, or after, the dose of afatinib. Monitor closely for signs and symptoms of afatinib toxicity and if the combination is not tolerated, reduce the afatinib dose by 10 mg. Risk D: Consider Therapy Modification
Alcohol (Ethyl): May increase hypotensive effects of Flibanserin. Management: Wait at least 2 hours after consuming 1 or 2 standard alcoholic drinks before taking flibanserin. Skip the flibanserin dose if 3 or more alcoholic drinks were consumed that evening. After taking flibanserin at bedtime, do not drink until the next day. Risk D: Consider Therapy Modification
Aliskiren: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Aliskiren. Risk C: Monitor
Alizapride: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Amisulpride (Oral): May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Articaine: May increase CNS depressant effects of CNS Depressants. Management: Consider reducing the dose of articaine if possible when used in patients who are also receiving CNS depressants. Monitor for excessive CNS depressant effects with any combined use. Risk D: Consider Therapy Modification
Azelastine (Nasal): May increase CNS depressant effects of CNS Depressants. Risk X: Avoid
Benperidol: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Beta-Acetyldigoxin: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Beta-Acetyldigoxin. Risk C: Monitor
Bilastine: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Bilastine. Risk X: Avoid
Blonanserin: CNS Depressants may increase CNS depressant effects of Blonanserin. Management: Use caution if coadministering blonanserin and CNS depressants; dose reduction of the other CNS depressant may be required. Strong CNS depressants should not be coadministered with blonanserin. Risk D: Consider Therapy Modification
Brexanolone: CNS Depressants may increase CNS depressant effects of Brexanolone. Risk C: Monitor
Brimonidine (Topical): May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Bromopride: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Bromperidol: May increase CNS depressant effects of CNS Depressants. Risk X: Avoid
Buclizine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Buprenorphine: CNS Depressants may increase CNS depressant effects of Buprenorphine. Management: Consider reduced doses of other CNS depressants, and avoiding such drugs in patients at high risk of buprenorphine overuse/self-injection. Initiate buprenorphine at lower doses in patients already receiving CNS depressants. Risk D: Consider Therapy Modification
BusPIRone: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Cannabinoid-Containing Products: CNS Depressants may increase CNS depressant effects of Cannabinoid-Containing Products. Risk C: Monitor
Celiprolol: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Celiprolol. Risk C: Monitor
Cetirizine (Systemic): May increase CNS depressant effects of CNS Depressants. Management: Consider avoiding this combination if possible. If required, monitor for excessive sedation or CNS depression, limit the dose and duration of combination therapy, and consider CNS depressant dose reductions. Risk D: Consider Therapy Modification
Chloral Hydrate/Chloral Betaine: CNS Depressants may increase CNS depressant effects of Chloral Hydrate/Chloral Betaine. Management: Consider alternatives to the use of chloral hydrate or chloral betaine and additional CNS depressants. If combined, consider a dose reduction of either agent and monitor closely for enhanced CNS depressive effects. Risk D: Consider Therapy Modification
Chlormethiazole: May increase CNS depressant effects of CNS Depressants. Management: Monitor closely for evidence of excessive CNS depression. The chlormethiazole labeling states that an appropriately reduced dose should be used if such a combination must be used. Risk D: Consider Therapy Modification
Chlorphenesin Carbamate: May increase adverse/toxic effects of CNS Depressants. Risk C: Monitor
Clofazimine: May increase serum concentration of CYP3A4 Substrates (High risk with Inhibitors). Risk C: Monitor
CNS Depressants: May increase adverse/toxic effects of CNS Depressants. Risk C: Monitor
Colchicine: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Colchicine. Colchicine distribution into certain tissues (e.g., brain) may also be increased. Management: This combination is often contraindicated, but combined use may be permitted with dose adjustment and monitoring. Recommendations vary based on brand, indication, use of CYP3A4 inhibitors, and hepatic/renal function. See interaction monograph for details. Risk D: Consider Therapy Modification
CycloSPORINE (Systemic): P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of CycloSPORINE (Systemic). Risk C: Monitor
CYP2C19 Inhibitors (Moderate): May increase serum concentration of Flibanserin. Risk C: Monitor
CYP3A4 Inducers (Moderate): May decrease serum concentration of Flibanserin. Risk X: Avoid
CYP3A4 Inducers (Strong): May decrease serum concentration of Flibanserin. Risk X: Avoid
CYP3A4 Inhibitors (Moderate): May increase serum concentration of Flibanserin. Management: Use of flibanserin with moderate CYP3A4 inhibitors is contraindicated. If starting flibanserin, start 2 weeks after the last dose of the CYP3A4 inhibitor. If starting a CYP3A4 inhibitor, start 2 days after the last dose of flibanserin. Risk X: Avoid
CYP3A4 Inhibitors (Strong): May increase serum concentration of Flibanserin. Management: Use of flibanserin with strong CYP3A4 inhibitors is contraindicated. If starting flibanserin, start 2 weeks after the last dose of the CYP3A4 inhibitor. If starting a CYP3A4 inhibitor, start 2 days after the last dose of flibanserin. Risk X: Avoid
CYP3A4 Inhibitors (Weak): May increase serum concentration of Flibanserin. Risk C: Monitor
Dabigatran Etexilate: P-glycoprotein/ABCB1 Inhibitors may increase active metabolite exposure of Dabigatran Etexilate. Risk C: Monitor
Dantrolene: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Daridorexant: May increase CNS depressant effects of CNS Depressants. Management: Dose reduction of daridorexant and/or any other CNS depressant may be necessary. Use of daridorexant with alcohol is not recommended, and the use of daridorexant with any other drug to treat insomnia is not recommended. Risk D: Consider Therapy Modification
DexmedeTOMIDine: CNS Depressants may increase CNS depressant effects of DexmedeTOMIDine. Management: Monitor for increased CNS depression during coadministration of dexmedetomidine and CNS depressants, and consider dose reductions of either agent to avoid excessive CNS depression. Risk D: Consider Therapy Modification
Difelikefalin: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Difenoxin: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Digitoxin: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Digitoxin. Risk C: Monitor
Digoxin: Flibanserin may increase serum concentration of Digoxin. Management: Measure digoxin serum concentrations before initiating treatment with flibanserin. Reduce digoxin concentrations by either reducing the digoxin dose by 30% to 50% or by modifying the dosing frequency. Risk D: Consider Therapy Modification
Dihydralazine: CNS Depressants may increase hypotensive effects of Dihydralazine. Risk C: Monitor
Dimethindene (Topical): May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Dothiepin: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
DOXOrubicin (Conventional): P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of DOXOrubicin (Conventional). Risk X: Avoid
DOXOrubicin (Liposomal): P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of DOXOrubicin (Liposomal). Risk C: Monitor
Doxylamine: CNS Depressants may increase CNS depressant effects of Doxylamine. Risk C: Monitor
DroPERidol: May increase CNS depressant effects of CNS Depressants. Management: Consider dose reductions of droperidol or of other CNS agents (eg, opioids, barbiturates) with concomitant use. Risk D: Consider Therapy Modification
Edoxaban: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Edoxaban. Risk C: Monitor
Emedastine (Systemic): May increase CNS depressant effects of CNS Depressants. Management: Consider avoiding this combination if possible. If required, monitor for excessive sedation or CNS depression, limit the dose and duration of combination therapy, and consider CNS depressant dose reductions. Risk C: Monitor
Ensartinib: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Ensartinib. Risk X: Avoid
Entacapone: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Esketamine (Nasal): May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Etoposide Phosphate: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Etoposide Phosphate. Risk C: Monitor
Etoposide: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Etoposide. Risk C: Monitor
Everolimus: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Everolimus. Risk C: Monitor
Flunarizine: CNS Depressants may increase CNS depressant effects of Flunarizine. Risk X: Avoid
Flunitrazepam: CNS Depressants may increase CNS depressant effects of Flunitrazepam. Management: Reduce the dose of CNS depressants when combined with flunitrazepam and monitor patients for evidence of CNS depression (eg, sedation, respiratory depression). Use non-CNS depressant alternatives when available. Risk D: Consider Therapy Modification
Fusidic Acid (Systemic): May increase serum concentration of CYP3A4 Substrates (High risk with Inhibitors). Management: Consider avoiding this combination if possible. If required, monitor patients closely for increased adverse effects of the CYP3A4 substrate. Risk D: Consider Therapy Modification
Glecaprevir and Pibrentasvir: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Glecaprevir and Pibrentasvir. Risk C: Monitor
Grapefruit Juice: May increase serum concentration of Flibanserin. Risk X: Avoid
Hormonal Contraceptives: May increase serum concentration of Flibanserin. Risk C: Monitor
HydrOXYzine: May increase CNS depressant effects of CNS Depressants. Management: Consider a decrease in the CNS depressant dose, as appropriate, when used together with hydroxyzine. Increase monitoring of signs/symptoms of CNS depression in any patient receiving hydroxyzine together with another CNS depressant. Risk D: Consider Therapy Modification
Ixabepilone: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Kava Kava: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Ketotifen (Systemic): May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Kratom: May increase CNS depressant effects of CNS Depressants. Risk X: Avoid
Lapatinib: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Lapatinib. Risk C: Monitor
Larotrectinib: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Larotrectinib. Risk C: Monitor
Lemborexant: May increase CNS depressant effects of CNS Depressants. Management: Dosage adjustments of lemborexant and of concomitant CNS depressants may be necessary when administered together because of potentially additive CNS depressant effects. Close monitoring for CNS depressant effects is necessary. Risk D: Consider Therapy Modification
Levocetirizine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Lisuride: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Lofepramine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Lofexidine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Loxapine: CNS Depressants may increase CNS depressant effects of Loxapine. Management: Consider reducing the dose of CNS depressants administered concomitantly with loxapine due to an increased risk of respiratory depression, sedation, hypotension, and syncope. Risk D: Consider Therapy Modification
Magnesium Sulfate: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Mavorixafor: Flibanserin may increase serum concentration of Mavorixafor. Mavorixafor may increase serum concentration of Flibanserin. Risk C: Monitor
Melitracen [INT]: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Mequitazine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Metergoline: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Methotrimeprazine: CNS Depressants may increase CNS depressant effects of Methotrimeprazine. Methotrimeprazine may increase CNS depressant effects of CNS Depressants. Management: Reduce the usual dose of CNS depressants by 50% if starting methotrimeprazine until the dose of methotrimeprazine is stable. Monitor patient closely for evidence of CNS depression. Risk D: Consider Therapy Modification
Methoxyflurane: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Metoclopramide: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
MetyroSINE: CNS Depressants may increase sedative effects of MetyroSINE. Risk C: Monitor
Minocycline (Systemic): May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Moxonidine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Nabilone: May increase CNS depressant effects of CNS Depressants. Risk X: Avoid
Nadolol: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Nadolol. Risk C: Monitor
Naldemedine: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Naldemedine. Risk C: Monitor
Nalfurafine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Naloxegol: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Naloxegol. Risk C: Monitor
Noscapine: CNS Depressants may increase adverse/toxic effects of Noscapine. Risk X: Avoid
Olopatadine (Nasal): May increase CNS depressant effects of CNS Depressants. Risk X: Avoid
Opicapone: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Opioid Agonists: CNS Depressants may increase CNS depressant effects of Opioid Agonists. Management: Avoid concomitant use of opioid agonists and benzodiazepines or other CNS depressants when possible. These agents should only be combined if alternative treatment options are inadequate. If combined, limit the dosages and duration of each drug. Risk D: Consider Therapy Modification
Opipramol: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Orphenadrine: CNS Depressants may increase CNS depressant effects of Orphenadrine. Risk X: Avoid
Oxomemazine: May increase CNS depressant effects of CNS Depressants. Risk X: Avoid
Oxybate Salt Products: CNS Depressants may increase CNS depressant effects of Oxybate Salt Products. Management: Consider alternatives to this combination when possible. If combined, dose reduction or discontinuation of one or more CNS depressants (including the oxybate salt product) should be considered. Interrupt oxybate salt treatment during short-term opioid use Risk D: Consider Therapy Modification
OxyCODONE: CNS Depressants may increase CNS depressant effects of OxyCODONE. Management: Avoid concomitant use of oxycodone and benzodiazepines or other CNS depressants when possible. These agents should only be combined if alternative treatment options are inadequate. If combined, limit the dosages and duration of each drug. Risk D: Consider Therapy Modification
Paliperidone: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Paraldehyde: CNS Depressants may increase CNS depressant effects of Paraldehyde. Risk X: Avoid
PAZOPanib: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of PAZOPanib. Risk X: Avoid
Perampanel: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Periciazine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Pipamperone: May increase adverse/toxic effects of CNS Depressants. Risk C: Monitor
Piribedil: CNS Depressants may increase CNS depressant effects of Piribedil. Risk C: Monitor
Pizotifen: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Pralsetinib: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Pralsetinib. Management: If this combo cannot be avoided, decrease pralsetinib dose from 400 mg daily to 300 mg daily; from 300 mg daily to 200 mg daily; and from 200 mg daily to 100 mg daily. Risk D: Consider Therapy Modification
Pramipexole: CNS Depressants may increase sedative effects of Pramipexole. Risk C: Monitor
Procarbazine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Ranolazine: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Ranolazine. Risk C: Monitor
Relugolix, Estradiol, and Norethindrone: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Relugolix, Estradiol, and Norethindrone. Management: Avoid use of relugolix/estradiol/norethindrone with P-glycoprotein (P-gp) inhibitors. If concomitant use is unavoidable, relugolix/estradiol/norethindrone should be administered at least 6 hours before the P-gp inhibitor. Risk D: Consider Therapy Modification
Relugolix: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Relugolix. Management: Avoid coadministration of relugolix with oral P-gp inhibitors whenever possible. If combined, take relugolix at least 6 hours prior to the P-gp inhibitor and monitor patients more frequently for adverse reactions. Risk D: Consider Therapy Modification
Repotrectinib: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Repotrectinib. Risk X: Avoid
RifAXIMin: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of RifAXIMin. Risk C: Monitor
Rilmenidine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Rimegepant: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Rimegepant. Management: Avoid administration of another dose of rimegepant within 48 hours if given concomitantly with a P-glycoprotein (P-gp) inhibitor. Risk D: Consider Therapy Modification
RisperiDONE: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of RisperiDONE. Risk C: Monitor
RomiDEPsin: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of RomiDEPsin. Risk C: Monitor
Ropeginterferon Alfa-2b: CNS Depressants may increase adverse/toxic effects of Ropeginterferon Alfa-2b. Specifically, the risk of neuropsychiatric adverse effects may be increased. Management: Avoid coadministration of ropeginterferon alfa-2b and other CNS depressants. If this combination cannot be avoided, monitor patients for neuropsychiatric adverse effects (eg, depression, suicidal ideation, aggression, mania). Risk D: Consider Therapy Modification
ROPINIRole: CNS Depressants may increase sedative effects of ROPINIRole. Risk C: Monitor
Rotigotine: CNS Depressants may increase sedative effects of Rotigotine. Risk C: Monitor
Silodosin: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Silodosin. Risk C: Monitor
Sirolimus (Conventional): P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Sirolimus (Conventional). Management: Avoid concurrent use of sirolimus with P-glycoprotein (P-gp) inhibitors when possible and alternative agents with lesser interaction potential with sirolimus should be considered. Monitor for increased sirolimus concentrations/toxicity if combined. Risk D: Consider Therapy Modification
Sirolimus (Protein Bound): P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Sirolimus (Protein Bound). Risk X: Avoid
Suvorexant: CNS Depressants may increase CNS depressant effects of Suvorexant. Management: Dose reduction of suvorexant and/or any other CNS depressant may be necessary. Use of suvorexant with alcohol is not recommended, and the use of suvorexant with any other drug to treat insomnia is not recommended. Risk D: Consider Therapy Modification
Tacrolimus (Systemic): P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Tacrolimus (Systemic). Risk C: Monitor
Talazoparib: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Talazoparib. Risk C: Monitor
Teniposide: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Teniposide. Risk C: Monitor
Tenofovir Disoproxil Fumarate: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Tenofovir Disoproxil Fumarate. Risk C: Monitor
Thalidomide: CNS Depressants may increase CNS depressant effects of Thalidomide. Risk X: Avoid
Topotecan: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Topotecan. Risk X: Avoid
Trimeprazine: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Ubrogepant: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Ubrogepant. Management: Use an initial ubrogepant dose of 50 mg and second dose (at least 2 hours later if needed) of 50 mg when used with a P-gp inhibitor. Risk D: Consider Therapy Modification
Valerian: May increase CNS depressant effects of CNS Depressants. Risk C: Monitor
Venetoclax: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of Venetoclax. Management: Reduce the venetoclax dose by at least 50% in patients requiring concomitant treatment with P-glycoprotein (P-gp) inhibitors. Resume the previous venetoclax dose 2 to 3 days after discontinuation of a P-gp inhibitor. Risk D: Consider Therapy Modification
VinCRIStine: P-glycoprotein/ABCB1 Inhibitors may increase serum concentration of VinCRIStine. Risk X: Avoid
Zolpidem: CNS Depressants may increase CNS depressant effects of Zolpidem. Management: Reduce the Intermezzo brand sublingual zolpidem adult dose to 1.75 mg for men who are also receiving other CNS depressants. No such dose change is recommended for women. Avoid use with other CNS depressants at bedtime; avoid use with alcohol. Risk D: Consider Therapy Modification
Zuranolone: May increase CNS depressant effects of CNS Depressants. Management: Consider alternatives to the use of zuranolone with other CNS depressants or alcohol. If combined, consider a zuranolone dose reduction and monitor patients closely for increased CNS depressant effects. Risk D: Consider Therapy Modification
An increased risk of adverse events was not observed with concomitant use of hormonal contraceptives (Simon 2019). Oral contraceptives are weak CYP3A4 inhibitors; use caution in patients taking flibanserin with multiple weak CYP3A4 inhibitors.
Adverse events were observed in some animal reproduction studies.
Outcome data following inadvertent exposure during pregnancy are limited (Derogatis 2012; Thorp 2012).
Data collection to monitor pregnancy and infant outcomes following exposure to flibanserin is ongoing. Health care providers are encouraged to enroll patients exposed to flibanserin during pregnancy in the pregnancy registry (1-855-265-6954); patients may also enroll themselves.
It is not known if flibanserin is present in breast milk.
Due to the potential for adverse reactions in the breastfeeding infant, including sedation, breastfeeding is not recommended by the manufacturer.
Monitor for signs of hypotension and syncope
The mechanism of action in the treatment of premenopausal women with hypoactive sexual desire disorder is not known. Flibanserin exhibits agonist activity at 5-HT1A and antagonist activity at 5-HT2A; moderate antagonist activity is seen at the 5-HT2B, 5-HT2C, and dopamine D4 receptors.
Protein binding: ~98%, primarily to albumin
Metabolism: Primarily metabolized by CYP3A4 and, to a lesser extent, by CYP2C19 to inactive metabolites.
Bioavailability: Oral: 33%
Half-life elimination: Terminal: ~11 hours; mild hepatic impairment: increased to 26 hours; CYP2C19 poor metabolizers: increased to 13.5 hours compared to CYP2C19 extensive metabolizers
Time to peak: 0.75 hours (range: 0.75 to 4 hours)
Excretion: Feces (51%); urine (44%)
Altered kidney function: Following a single 50 mg dose in patients with renal impairment, the AUC was increased 1.1-fold in patients with mild to moderate impairment (GFR ≤80 mL/minute) and 1.2-fold in patients with severe impairment (GFR <30 mL/minute).
Hepatic function impairment: Following a single 50 mg dose in patients with mild hepatic impairment (Child-Pugh class A), the AUC was increased 4.5-fold.
CYP2C19 poor metabolizers: In patients who are poor metabolizers of CYP2C19, AUC was increased 1.3-fold, Cmax was increased 1.5-fold.
