Afatinib 30 mg Tablet: Full Guide to Uses, Dosage, Side Effects & Warnings

✅ What is Afatinib 30 mg Used For?

Afatinib 30 mg is a prescription cancer medication used primarily to treat:

1. Non-Small Cell Lung Cancer (NSCLC):
   • Specifically used in patients with EGFR (epidermal growth factor receptor) mutation-positive NSCLC.
   • Suitable for patients with locally advanced or metastatic disease.
2. Recurrent or Metastatic Squamous Cell Carcinoma of the Head and Neck (SCCHN):
   • Administered when the cancer progresses after platinum-based chemotherapy.

💊 Dosage and Administration

Typical Dose:

• Afatinib 30 mg is often used when a patient cannot tolerate the standard 40 mg dose due to side effects.
• It can also be the initial dose in patients with poor health status or other risk factors.

Administration Guidelines:

• Take one tablet once daily, at the same time each day.
• Should be taken at least 1 hour before or 2 hours after a meal.
• Swallow the tablet whole with water; do not crush or chew.

Dose Adjustments:

• Dose may be reduced to 20 mg or increased to 40 mg depending on patient tolerance and side effects.
• Treatment is usually continued until disease progression or unacceptable toxicity.

⚠️ Warnings and Precautions

Monitor and Report the Following:

1. Diarrhea:
   • Very common and can become severe or life-threatening if not managed promptly.
   • Antidiarrheal agents (e.g., loperamide) should be started at the first sign of loose stools.
2. Skin Reactions:
   • Acne-like rash, dry skin, and itching are common.
   • These may require topical or systemic treatment and dose adjustment.
3. Hepatotoxicity:
   • Monitor liver function tests periodically, especially in patients with preexisting liver conditions.
4. Interstitial Lung Disease (ILD):
   • Although rare, ILD is a serious and potentially fatal side effect.
   • Discontinue immediately if ILD is suspected (symptoms include shortness of breath, dry cough, fever).
5. Eye Disorders:
   • Dry eye, conjunctivitis, and keratitis may occur.
   • Seek ophthalmologic consultation if symptoms worsen.
6. Cardiac Risk:
   • Afatinib may cause QT prolongation or other cardiac arrhythmias in rare cases.
7. Pregnancy Risk:
   • Afatinib is teratogenic. Use effective contraception during treatment and for at least 2 weeks after the last dose.

❌ Contraindications

• Hypersensitivity to Afatinib or any ingredient in the formulation.
• Should not be used during pregnancy or breastfeeding.

🔄 Drug Interactions

Afatinib is not metabolized via the CYP450 pathway, but it can still interact with:

• P-glycoprotein (P-gp) inhibitors/inducers:
  • Inhibitors (e.g., ritonavir, ketoconazole) may increase Afatinib levels.
  • Inducers (e.g., rifampicin, carbamazepine) may reduce its effectiveness.
• Antacids:
  • May affect Afatinib absorption. Separate doses by several hours.
• Other cancer therapies:
  • Caution when combining with other chemotherapeutics or radiation therapy.

🤰 Use in Pregnancy and Lactation

• Pregnancy: Category D – positive evidence of fetal risk.
• Lactation: Unknown if Afatinib is excreted in human milk. Discontinue nursing or the drug based on risk-benefit assessment.

🔬 Monitoring Parameters

• Liver function tests (ALT, AST, bilirubin)
• Renal function
• Skin and gastrointestinal toxicity
• Respiratory symptoms (ILD monitoring)
• ECG (for QT prolongation in high-risk patients)

⚠️ Side Effects

Common Side Effects:

• Diarrhea
• Rash and skin irritation
• Stomatitis (mouth sores)
• Dry skin
• Paronychia (nail inflammation)
• Nausea, vomiting
• FatigueFatigue

Serious Side Effects:

• Interstitial lung disease (ILD)
• Liver toxicity
• Severe dehydration from diarrhea
• Eye problems (keratitis, ulceration)
• Cardiac arrhythmias

🧊 Storage

• Store at 15°C to 30°C (59°F to 86°F)
• Protect from moisture and heat
• Keep out of reach of children