IRESSA Oral
In Depth
- Uses and How to Use
- Dosage and Storage
- Precautions and Side Effects
- Drug Interactions
- Drug Images
Pronounced: (geh-FIT-ih-nib)
IRESSA Oral Interactions
Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with them first.
Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription products you may use, especially of:
- "blood thinners" (warfarin)
- drugs which reduce stomach acid (e.g., ranitidine, cimetidine, famotidine, omeprazole, lansoprazole, rabeprazole)
- certain liver enzyme inhibitors (CYP 3A4 inhibitors such as ketoconazole, itraconazole, erythromycin, clarithromycin)
- vinorelbine
Some liver enzyme inducer medications such as rifamycins (e.g., rifampin, rifabutin), St. John's wort or phenytoin will stimulate certain liver enzymes (CYP 3A4). Your dosage of gefitinib may need to be increased if you are using such medications. Consult your doctor or pharmacist for more details.
This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.
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