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Healthnotes Index:

Gefitinib

Pronounced

"geh-FIT-ih-nib"

Common brand names:

Iressa

Uses

Gefitinib is used to treat lung cancer. It works by slowing or stopping the growth of cancer cells. Gefitinib blocks a certain protein (an enzyme called tyrosine kinase).

How to Use This Medication

Read the Patient Information Leaflet if available from your pharmacist before you start taking gefitinib and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

Take gefitinib by mouth with or without food as directed by your doctor, usually once daily.

If you have trouble swallowing the tablet, you may place the tablet in a glass of water (4 to 8 ounces/120 to 240 milliliters). Stir well for 15 minutes. Drink all of the mixture right away. Rinse the cup with another 4 to 8 ounces (120 to 240 milliliters) of water and drink the rinse water to make sure you get the full dose.

Medications which reduce or block stomach acid (such as proton pump inhibitors/PPIs, H2 blockers, antacids) may reduce the absorption of gefitinib, making it work less well. If you take PPIs (such as omeprazole, lansoprazole), take gefitinib at least 12 hours before or 12 after the PPI. If you take antacids or H2 blockers (such as famotidine, ranitidine), take them at least 6 hours before or at least 6 hours after this medication.

The dosage is based on your medical condition, response to treatment, lab tests, and other medications you may be taking. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day.

Do not increase your dose or use this drug more often or for longer than prescribed. Your condition will not improve any faster, and your risk of side effects will increase.

Copyright © 2024 TraceGains, Inc. All rights reserved.

RxAnswers™ is a copyrighted combined product from TraceGains and First DataBank, Inc.

Drug information is selected from data included with permission and copyrighted by First DataBank, Inc. This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your healthcare professional. Always seek the advice of your healthcare professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your healthcare professional. This information does not contain any assurances that this product is safe, effective or appropriate for you.

This information is intended only for residents of the United States. Products sold under the same brand names in other countries may contain different ingredients.

Learn more about First DataBank

There are some limitations on the information provided in “Nutrient Interactions.” Do NOT rely solely on the information in this article. Please read the disclaimer.

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TraceGains and/or its suppliers make no warranties or representations as to the accuracy or completeness of this content herein or that of any organization referred or linked to within this content and will not be liable for any damages arising out of your access to or use of any information found herein or that of any organization referred to within this content.

Information expires December 2024.

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