Drug Detail:Afatinib (Afatinib)
Drug Class: Multikinase inhibitors
Usual Adult Dose for Non-Small Cell Lung Cancer
40 mg orally once a day until disease progression or intolerance by the patient
Comments:
- Take on an empty stomach at least 1 hour before or 2 hours after a meal.
- Epidermal growth factor receptor (EGFR) mutation status should be established prior to therapy initiation.
- Do not take a missed dose within 12 hours of the next dose.
Uses:
- EGFR Mutation-Positive, Metastatic Non-Small Cell Lung Cancer: For the first-line treatment of patients with metastatic non-small cell lung cancer (NSCLC) whose tumors have non-resistant epidermal growth factor receptor (EGFR) mutations as detected by an approved test.
- Previously Treated, Metastatic Squamous NSCLC: For the treatment of patients with metastatic squamous NSCLC progressing after platinum-based chemotherapy.
Renal Dose Adjustments
- Mild to moderate renal impairment (CrCl 30 mL/min or greater): No adjustment recommended.
- Severe renal impairment (CrCl 15 to 29 mL/min): 30 mg orally once a day
- End stage renal disease (CrCl less than 15 mL/min) or dialysis: Data not available
Liver Dose Adjustments
- Mild (Child-Pugh A) to moderate (Child-Pugh B) hepatic impairment: No adjustment recommended.
- Severe (Child-Pugh C) hepatic impairment: Closely monitor patient and adjust dose if not tolerated.
Dose Adjustments
Dose Modifications for Adverse Reactions:
WITHHOLD THERAPY FOR:
- National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) Grade 3 or higher.
- Diarrhea Grade 2 or higher persisting for 2 or more consecutive days while taking antidiarrheal medication.
- Cutaneous reactions of Grade 2 that are prolonged (lasting more than 7 days) or intolerable.
- Renal impairment Grade 2 or higher.
PERMANENTLY DISCONTINUE THERAPY FOR:
- Life-threatening bullous, blistering, or exfoliative skin lesions
- Confirmed interstitial lung disease (ILD)
- Severe drug-induced hepatic impairment
- Persistent ulcerative keratitis
- Symptomatic left ventricular dysfunction
- Severe or intolerable adverse reaction occurring at a dose of 20 mg per day
Dose Modifications for Drug Interactions:
- P-gp Inhibitors: Reduce the daily dose by 10 mg if not tolerated for patients who require therapy with a P-glycoprotein (P-gp) inhibitor. Resume the previous dose after discontinuation of the P-gp inhibitor as tolerated.
- P-gp Inducers: Increase the daily dose by 10 mg as tolerated for patients who require chronic therapy with a P-gp inducer. Resume the previous dose 2 to 3 days after discontinuation of the P-gp inducer.
Precautions
CONTRAINDICATIONS:
- None
Safety and efficacy have not been established in patients younger than 18 years.
Consult WARNINGS section for additional precautions.
Dialysis
Data not available
Other Comments
Administration advice:
- Swallow tablets whole with water.
- In case of swallowing difficulties, the tablets may be dispersed (not crushed) in approximately 100 mL of noncarbonated water. The dispersion may also be given via a gastric tube.
- Take on an empty stomach.
- Do not take a missed dose within 12 hours of the next dose.
Storage requirements:
- Store in original container to protect from exposure to moisture and light.
General:
- If P-glycoprotein (P-gp) inhibitors are required, they should be administered simultaneously with or after this drug.
- A well-validated test is recommended when determining EGFR mutation status.
- Limitation of use: The safety and efficacy of this drug have not been established in patients whose tumors have resistant EGFR mutations.
Frequently asked questions
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