Iressa (Oral)

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Iressa (Oral) Drug and Prescription Information

Iressa (Oral)

Iressa (Oral) Medication Classification

GEFITINIB (By mouth)

Iressa (Oral) Brandname


Iressa (Oral) is used for the Treatment

Gefitinib (ge-FI-tye-nib) Treats non-small cell lung cancer (NSCLC).

When To Not Use Iressa (Oral)

You should not use this medicine if you have had an allergic reaction to gefitinib, or if you are pregnant.

How Should You Use Iressa (Oral)


  • Medicines used to treat cancer are very strong and can have many side effects. Before receiving this medicine, make sure you understand all the risks and benefits. It is important for you to work closely with your doctor during your treatment.
  • Your doctor will tell you how much of this medicine to use and how often. Do not use more medicine or use it more often than your doctor tells you to.
  • You may take this medicine with or without food.
  • If a dose is missed:
  • If you miss a dose or forget to use your medicine, use it as soon as you can. If it is almost time for your next dose, wait until then to use the medicine and skip the missed dose. Do not use extra medicine to make up for a missed dose.

Proper Iressa (Oral) Storage

Store Iressa (Oral) at room temperature away from sunlight and moisture unless otherwise stated by manufacturer's instructions or labelling. Keep Iressa (Oral) and all medications out of the reach of children.

What To Avoid While Using Iressa (Oral)

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you are also using rifampin (Rifadin®, Rifater®), a blood thinner such as warfarin (Coumadin®), medicine for seizures (such as carbamazepine, ethosuximide, phenytoin, primidone, Dilantin®, Tegretol®), medicine to treat fungal infections (such as fluconazole, itraconazole, ketoconazole, Diflucan®, Nizoral®, Sporanox®), or medicine for heartburn or nausea (such as cimetidine, ranitidine, Tagamet®, Zantac®).

Iressa (Oral) Warnings

  • Make sure your doctor knows if you are breastfeeding, or if you have liver disease, kidney disease, or pulmonary fibrosis (scar tissue in your lungs).
  • Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away.
  • Cancer medicines can cause nausea and/or vomiting in most people, sometimes even after receiving medicines to prevent it. Ask your doctor or nurse about other ways to control these side effects.
  • Your doctor might need to check your blood at regular visits while you are using this medicine. Be sure to keep all appointments.

Iressa (Oral) Side Effects

Call your doctor right away if you notice any of these side effects:

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing.
  • Eye pain or trouble seeing
  • Severe or ongoing diarrhea, nausea, vomiting, or loss of appetite
  • Severe skin rash
  • Sudden and severe stomach pain, nausea, vomiting, fever, and lightheadedness
  • Sudden or increased breathing problems, cough, fever
  • If you notice these less serious side effects, talk with your doctor:
  • Dry skin, acne
  • Mild diarrhea, nausea, vomiting
  • Mild skin rash

Iressa (Oral) Ratings

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