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Axatilimab: Drug information

Axatilimab: Drug information
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For additional information see "Axatilimab: Pediatric drug information" and "Axatilimab: Patient drug information"

For abbreviations, symbols, and age group definitions show table
Brand Names: US
  • Niktimvo
Pharmacologic Category
  • Colony Stimulating Factor-1 Receptor (CSF-1R) Inhibitor;
  • Monoclonal Antibody
Dosing: Adult

Dosage guidance:

Clinical considerations: Should only be administered in patients weighing ≥40 kg. For patients who experienced an infusion-related reaction with a previous dose, premedicate for subsequent doses with an antihistamine and an antipyretic.

Graft-versus-host disease, chronic

Graft-versus-host disease, chronic: Patients weighing ≥40 kg: IV: 0.3 mg/kg (maximum dose: 35 mg) once every 2 weeks until disease progression or unacceptable toxicity.

Dosing: Kidney Impairment: Adult

Note: Kidney function estimated by the Cockcroft-Gault equation.

CrCl ≥30 mL/minute: There are no dosage adjustments provided in the manufacturer's labeling; however, CrCl 30 to 89 mL/minute had no clinically meaningful difference in axatilimab pharmacokinetics.

CrCl 15 to 29 mL/minute: There are no dosage adjustments provided in the manufacturer's labeling (effect on axatilimab pharmacokinetics is unknown).

CrCl <15 mL/minute: There are no dosage adjustments provided in the manufacturer's labeling.

Dosing: Liver Impairment: Adult

Altered liver function prior to treatment initiation:

Mild impairment (total bilirubin ≤ ULN and AST > ULN or total bilirubin 1 to ≤1.5 times ULN and any AST): There are no dosage adjustments provided in the manufacturer's labeling; however, mild impairment had no clinically meaningful difference in axatilimab pharmacokinetics.

Moderate or severe impairment (total bilirubin >1.5 times ULN and any AST): There are no dosage adjustments provided in the manufacturer's labeling (effect on axatilimab pharmacokinetics is unknown).

Acute hepatotoxicity during treatment:

AST or ALT elevation (on the day of dosing):

ALT or AST ≥3 times ULN with total bilirubin ≥2 times ULN and alkaline phosphatase <2 times ULN: Withhold axatilimab and investigate for drug-induced liver injury. If confirmed, permanently discontinue axatilimab.

Grade 3 with total bilirubin ≤ grade 1: Withhold axatilimab until recovery to grade 2, then resume at 0.2 mg/kg (maximum dose: 23 mg) once every 2 weeks.

Grade 4: Permanently discontinue axatilimab.

Dosing: Adjustment for Toxicity: Adult
Axatilimab Recommended Dosage Modifications for Adverse Reactions

Adverse Reaction

Severity

Axatilimab dosage modification

Elevation of CPK, amylase, or lipase

≥ Grade 3

No evidence of end-organ damage on diagnostic evaluation: Continue axatilimab without dose reduction.

Evidence of end-organ damage on diagnostic evaluation: Permanently discontinue axatilimab.

Symptomatic ≥ grade 3

Permanently discontinue axatilimab.

Infusion-related reactions

Grade 1 or 2

Initiate symptomatic management (eg, antihistamines, antipyretics).

Temporarily interrupt axatilimab infusion until resolution or decrease infusion rate by 50%.

Premedicate (with an antihistamine and an antipyretic) and resume infusion at 50% of the prior rate for subsequent axatilimab infusions.

Grade 3 or 4

Permanently discontinue axatilimab.

Other nonhematologic adverse reactions

Grade 3

Withhold axatilimab until recovery to grade 2.

Delay ≤4 weeks from planned infusion: Resume axatilimab at 0.2 mg/kg (maximum dose: 23 mg) once every 2 weeks.

Delay >4 weeks from planned infusion: Permanently discontinue axatilimab.

Grade 4

Permanently discontinue axatilimab.

Dosing: Older Adult

Refer to adult dosing.

Dosing: Pediatric

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

Dosage guidance:

Safety: Patients who previously experienced an infusion-related reaction to axatilimab should premedicate with an antihistamine and antipyretic with subsequent infusions.

Graft-versus-host disease, chronic

Graft-versus-host disease, chronic: Note: Reserve use for patients who have failed ≥2 prior lines of systemic therapy.

Children and Adolescents, weighing ≥40 kg: IV: 0.3 mg/kg/dose every 2 weeks; maximum dose: 35 mg/dose; continue until disease progression or unacceptable toxicity (Ref).

Dosage adjustment for toxicity:

Children and Adolescents, weighing ≥40 kg: IV:

Axatilimab Dosage Reductions in Pediatric Patients Weighing ≥40 kg

Adverse reaction

Description/severity

Axatilimab dosage modification

Increases in CPK, amylase, or lipase

≥ Grade 3, asymptomatic

Perform diagnostic evaluation for evidence of end-organ damage.

• If no evidence, continue without dose reduction.

• If evidence, permanently discontinue therapy.

≥ Grade 3, symptomatic

Permanently discontinue therapy.

Other non-hematologic adverse effects

Grade 3

Withhold axatilimab therapy until recovery to grade 2.

• If recovery delayed therapy by ≤4 weeks from planned infusion, decrease dose to 0.2 mg/kg/dose every 2 weeks; maximum dose: 23 mg/dose.

• If recovery delayed therapy by >4 weeks from planned infusion, permanently discontinue therapy.

Grade 4

Permanently discontinue therapy.

Dosing: Kidney Impairment: Pediatric

Children and Adolescents, weighing ≥40 kg: IV:

eGFR ≥30 mL/minute: No adjustment needed; pharmacokinetic analysis reported no clinically meaningful differences in exposure in patients with mild to moderate altered kidney impairment (eGFR 30 to 89 mL/minute) and normal kidney function.

eGFR <30 mL/minute: There are no dosage adjustments provided in the manufacturer's labeling; has not been studied.

Dosing: Liver Impairment: Pediatric

Children and Adolescents, weighing ≥40 kg: IV:

Axatilimab Dosage Adjustment for Liver Impairment in Pediatric Patients ≥40 kg

Adverse reaction

Description/severity

Axatilimab dosage modification

Baseline liver impairment

Mild liver impairment (total bilirubin ≤ ULN and AST > ULN or total bilirubin 1 to ≤1.5 × ULN and any AST)

No dosage adjustment necessary; pharmacokinetic analysis reported no clinically meaningful differences in exposure; monitor closely for adverse effects.

Moderate to severe liver impairment (total bilirubin >1.5 × ULN and any AST)

Has not been studied; monitor closely for adverse effects; if adverse effects occur, adjust dose based on dosage reduction and dosage adjustment for toxicity tables.

Liver toxicity during therapy

Elevation of AST or ALT on day of dosing

Grade 3 with total bilirubin ≤ grade 1

Withhold axatilimab until recovery to grade 2 then resume at a reduced dose of 0.2 mg/kg/dose every 2 weeks; maximum dose: 23 mg/dose.

Elevation of AST or ALT anytime during therapy

ALT or AST ≥3 × ULN with total bilirubin ≥2 × ULN and alkaline phosphatase <2 × ULN

Withhold axatilimab; evaluate for drug-induced liver injury (DILI); if confirmed, permanently discontinue therapy.

Grade 4

Permanently discontinue therapy.

Adverse Reactions

The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified. Reported adverse reactions are for children, adolescents, and adults.

>10%:

Cardiovascular: Edema (13%)

Endocrine & metabolic: Decreased serum phosphate (51%), increased serum calcium (31%)

Gastrointestinal: Decreased appetite (11%), diarrhea (18%; including colitis), increased serum amylase (32%), increased serum lipase (34%), nausea (23%)

Hematologic & oncologic: Decreased hemoglobin (48%), hemorrhage (11%)

Hepatic: Increased gamma-glutamyl transferase (39%), increased serum alanine aminotransferase (51%), increased serum alkaline phosphatase (28%), increased serum aspartate aminotransferase (61%)

Hypersensitivity: Infusion-related reaction (18%; including hypersensitivity reaction [13%])

Infection: Infection (57%; including bacterial infection [15%], viral infection [43%])

Nervous system: Dizziness (11%), fatigue (32%), headache (20%)

Neuromuscular & skeletal: Increased creatine phosphokinase in blood specimen (25%), musculoskeletal pain (35%)

Respiratory: Cough (18%), dyspnea (15%)

Miscellaneous: Fever (15%)

1% to 10%:

Cardiovascular: Hypertension (<10%)

Dermatologic: Pruritus (<10%), skin rash (10%; including bullous dermatitis, exfoliative dermatitis, maculopapular rash)

Ophthalmic: Periorbital edema (<10%)

Respiratory: Respiratory failure (>3%)

Frequency not defined: Immunologic: Antibody development (including neutralizing)

Contraindications

There are no contraindications listed in the manufacturer's labeling.

Warnings/Precautions

Concerns related to adverse effects:

• Infusion-related reactions: Axatilimab may cause infusion-related reactions. Infusion-related reactions, including hypersensitivity reactions, occurred in nearly one-fifth of axatilimab-treated patients. Grade 3 or 4 infusion related reactions occurred in a small percentage of patients. Signs/symptoms of infusion reactions have included fever, chills, rash, flushing, dyspnea, and hypertension.

Dosage form specific issues:

• Polysorbate 80: Some dosage forms may contain polysorbate 80 (also known as Tweens). Hypersensitivity reactions, usually a delayed reaction, have been reported following exposure to pharmaceutical products containing polysorbate 80 in certain individuals (Ref). Thrombocytopenia, ascites, pulmonary deterioration, and renal and hepatic failure have been reported in premature neonates after receiving parenteral products containing polysorbate 80 (Ref). See manufacturer's labeling.

Warnings: Additional Pediatric Considerations

Observations from animal data suggest a possible thickening of growth plate, metaphysis, and/or femoral growth plate degeneration; monitoring of bone and growth development in pediatric patients suggested.

Dosage Forms: US

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

Solution, Intravenous [preservative free]:

Niktimvo: Axatilimab-csfr 9 mg/0.18 mL (0.18 mL); Axatilimab-csfr 22 mg/0.44 mL (0.44 mL) [contains polysorbate 80]

Generic Equivalent Available: US

No

Pricing: US

Solution (Niktimvo Intravenous)

9MG/0.18ML (per 0.18 mL): $5,670.00

22MG/0.44ML (per 0.44 mL): $13,860.00

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

IV: Infuse over 30 minutes through a dedicated infusion line that includes a sterile, low-protein binding, 0.2-micron in-line or add-on polyethersulfone filter. Do not coadminister other medications through the same infusion line. After administration, flush the infusion line with NS.

Administration: Pediatric

Note: If patient previously experienced an infusion-related reaction to axatilimab, premedicate with an antihistamine and antipyretic.

IV: Administer over 30 minutes via a dedicated IV line through a low-protein 0.2 micron inline filter or an add-on polyethersulfone filter. Flush line with NS after completion of infusion.

Rate adjustment for infusion-related reactions:

Grade 1 or 2: May either temporarily interrupt the infusion or decrease infusion rate by 50%. Initiate symptomatic treatment for the reaction.

Subsequent infusions: Starting with the next infusion, premedicate with an antihistamine and antipyretic; resume infusion at 50% of the prior infusion rate.

Grade 3 or 4: Permanently discontinue axatilimab.

Use: Labeled Indications

Chronic graft-versus-host disease: Treatment of chronic graft-versus-host disease (cGVHD) after failure of at least 2 prior lines of systemic therapy in adult and pediatric patients weighing ≥40 kg.

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

Axatilimab may be confused with axitinib.

Metabolism/Transport Effects

None known.

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 drug interactions program by clicking on the “Launch drug interactions program” link above.

Efgartigimod Alfa: May decrease therapeutic effects of Fc Receptor-Binding Agents. Risk C: Monitor

Nipocalimab: May decrease therapeutic effects of Fc Receptor-Binding Agents. Risk C: Monitor

Rozanolixizumab: May decrease therapeutic effects of Fc Receptor-Binding Agents. Risk C: Monitor

Reproductive Considerations

Verify pregnancy status prior to initiating treatment in patients who could become pregnant.

Patients who could become pregnant should use effective contraception during therapy and for 30 days after the last dose of axatilimab.

Pregnancy Considerations

Animal reproduction studies have not been conducted. Based on the mechanism of action, in utero exposure to axatilimab may cause fetal harm.

Axatilimab is a humanized monoclonal antibody (IgG4). Human IgG crosses the placenta. Fetal exposure is dependent upon the IgG subclass, maternal serum concentrations, placental integrity, newborn birth weight, and GA, generally increasing as pregnancy progresses. The lowest exposure would be expected during the period of organogenesis and the highest during the third trimester (Ref).

Breastfeeding Considerations

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

Axatilimab is a humanized monoclonal antibody (IgG4). Human IgG is present in breast milk; concentrations are dependent upon IgG subclass and postpartum age (Ref). Due to the potential for serious adverse reactions in the breastfed infant, breastfeeding is not recommended by the manufacturer during therapy and for 30 days after the last dose of axatilimab.

Monitoring Parameters

Evaluate ALT, AST, alkaline phosphatase, CPK, amylase, and lipase prior to the start of therapy, every 2 weeks for the first month, and every 1 to 2 months thereafter until abnormalities are resolved. Verify pregnancy status prior to initiating treatment (in patients who could become pregnant). Monitor for signs/symptoms of infusion-related reactions (eg, fever, chills, rash, flushing, dyspnea, and hypertension). Monitor bone growth/development (in pediatric patients).

Mechanism of Action

Axatilimab is a monoclonal antibody that binds to colony stimulating factor-1 receptors (CSF-1R) expressed on monocytes and macrophages. Blocking CSF-1R reduces the levels of these circulating proinflammatory and profibrotic monocytes and monocyte-derived macrophages and inhibits the activity of pathogenic macrophages in tissues.

Pharmacokinetics (Adult Data Unless Noted)

Note: In pediatric patients ≥40 kg, pharmacokinetic parameters were similar to adult patients.

Distribution: Vd: 6.06 L.

Metabolism: Expected to be metabolized into small peptides via catabolic pathways.

Excretion: Total clearance: 0.07 L/hour.

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  7. Niktimvo (axatilimab) [prescribing information]. Wilmington, DE: Incyte Corporation; August 2024.
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  10. Refer to manufacturer's labeling.
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