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Gilotrif (Afatinib dimaleate) Information

Gilotrif, which contains the active ingredient afatinib, is a targeted therapy medication classified as a kinase inhibitor. It is primarily used for the first-line treatment of patients with metastatic non-small cell lung cancer (NSCLC) whose tumors have specific non-resistant epidermal growth factor receptor (EGFR) mutations. It is also indicated for patients with squamous NSCLC that has progressed after platinum-based chemotherapy. By targeting the genetic drivers of the tumor, Gilotrif helps stall the growth and spread of cancer cells more effectively than traditional chemotherapy in eligible patients. It is taken by mouth as a tablet, typically once daily.

The mechanism of action involves the irreversible inhibition of the ErbB family of tyrosine kinases. Unlike some other inhibitors that only target one receptor, afatinib binds permanently to EGFR (ErbB1), HER2 (ErbB2), and ErbB4. These receptors signal cells to grow and multiply. In certain lung cancers, these signals are stuck in the "on" position. By covalently bonding to these receptors and blocking their signaling, Gilotrif shuts down the pathway, leading to tumor shrinkage and a delay in cancer progression.

Gilotrif Side Effects

Gilotrif is generally well-tolerated, but some common side effects may occur as your body adjusts to the medication. Commonly reported effects include severe diarrhea, skin reactions such as an acne-like rash, dry skin, and itching, mouth sores (stomatitis), nail infections (paronychia), decreased appetite, and nausea.

More serious side effects can occur and require immediate medical attention. Stop taking the medication and seek help if you experience:
• Eye Problems: Eye pain, redness, blurred vision, or sensitivity to light (keratitis).
• Heart Failure: Sudden weight gain, swelling in the legs or ankles, or significant trouble breathing while lying down.
• Liver Dysfunction: Yellowing of the skin or eyes (jaundice), dark urine, or pain in the upper right side of the stomach.
• Lung Inflammation (ILD/Pneumonitis): New or worsening shortness of breath, cough, or fever.
• Severe Diarrhea: Frequent, watery stools that lead to dehydration, dizziness, or a racing heart.
• Severe Skin Reactions: Widespread peeling, blistering, or painful skin lesions (which may indicate Stevens-Johnson Syndrome).

Gilotrif Precautions

Do not use Gilotrif if you have a known allergy to afatinib or any other ingredients in the tablet. Before starting treatment, inform your doctor of your complete medical history, especially if you have a history of lung or breathing problems other than cancer, kidney disease, liver disease, heart problems, or a history of eye inflammation. Your doctor should also be aware of any underlying gastrointestinal issues, as the risk of severe diarrhea is high with this medication.

Tell your doctor about all medications you take, including prescription and over-the-counter products. Gilotrif has specific drug interactions, particularly with the P-glycoprotein (P-gp) transport system. Strong P-gp inhibitors (such as ritonavir, cyclosporine, or verapamil) can increase Gilotrif levels in your blood. Strong P-gp inducers (such as rifampin, carbamazepine, or St. John's Wort) can also reduce the medication's effectiveness. If you must take a P-gp inhibitor, your doctor may adjust the timing or dosage of your Gilotrif. It is also essential to avoid certain supplements and over-the-counter medications that may worsen diarrhea or skin sensitivity.

Inform your doctor if you are pregnant, planning to become pregnant, or breastfeeding. Gilotrif can cause fetal harm and is not recommended during pregnancy. Women of reproductive potential should use effective contraception during treatment and for at least two weeks after the final dose. Because of the potential for severe adverse reactions in nursing infants, you should not breastfeed while taking Gilotrif and for two weeks after the last dose.

Take Gilotrif exactly as prescribed, at least 1 hour before or 2 hours after a meal (on an empty stomach). Taking it with food significantly reduces its effectiveness. If you miss a dose and it is within 12 hours of your next scheduled dose, skip the missed dose. Store the tablets at room temperature in the original container, away from moisture and light, and keep them out of reach of children.

Do I need a prescription to order Giotrif?

Yes, a prescription is required from your physician to order Giotrif.