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 Gefitinib Tablet
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.
Gefitinib Side Effects
See also Warning section.
Diarrhea, rash, acne, nausea, vomiting, loss of appetite, nail problems, hair loss, red/sore mouth or throat, or unusual weakness may occur. If any of these effects persist or worsen, notify your doctor or pharmacist right away.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Persistent nausea, vomiting, diarrhea, or loss of appetite may result in a serious loss of body water (dehydration) and kidney problems. Contact your doctor promptly if you notice any symptoms of dehydration, such as: unusual decreased urination, unusual dry mouth/thirst, fast heartbeat, dizziness/lightheadedness.
Tell your doctor right away if any of these unlikely but serious side effects occur: unusual bleeding (coughing up blood, blood in urine), eye irritation/pain, swelling of the ankles/feet.
Gefitinib may cause rare (possibly fatal) lung disease (interstitial lung disease-ILD). Tell your doctor right away if you develop trouble breathing, cough or fever.
If you have persistent diarrhea or skin rashes contact your doctor. Your doctor may temporarily stop gefitinib (for up to 14 days) which may help reverse those side effects. Treatment is then resumed with the same dosage.
An allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of an allergic reaction include: severe rash, itching/swelling (especially of the face/tongue/throat), dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
Before taking this medication, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: lung disease (e.g., pulmonary fibrosis), severe kidney disease, eye problems, stomach/intestinal ulcers, other stomach/intestinal problems (such as diverticulitis, blockage, bowel disease), smoking, cancer that has spread to the bowels.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using gefitinib. Gefitinib may harm an unborn baby. Ask about reliable forms of birth control while using this medication and for 2 weeks after stopping treatment. If you become pregnant, talk to your doctor right away about the risks and benefits of this medication.
It is unknown if this drug passes into breast milk. Because of possible risk to the infant, breast-feeding while using gefitinib is not recommended. Consult your doctor before breast-feeding.
See also How to Use section.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug are: "blood thinners" (warfarin), drugs which reduce stomach acid (e.g., ranitidine, cimetidine, famotidine, omeprazole, lansoprazole, rabeprazole), vinorelbine, NSAIDs (such as ibuprofen, naproxen), corticosteroids (such as prednisone).
Note: We strongly encourage you to talk with your health care professional about your specific medical condition and treatments. The information contained in this website is meant to be helpful and educational, but is not a substitute for medical advice.
Gefitinib View Uses, Side Effects and Medicines, cost, Gefitinib price.