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cimetidine (generic name)

(sye MET i deen): An H2 blocker - It is used to treat stomach or intestinal ulcers
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Cimetidine Oral tablet

What should I watch for while using this medicine?

Tell your doctor or health care professional if your pain does not start to get better or gets worse. You may need to take this medicine for several days before your symptoms get better. Finish the full course of tablets prescribed by your doctor or health care professional even if you feel better.

Do not take with aspirin, ibuprofen, or other antiinflammatory medicines unless directed to do so by your health care professional. These can make your condition worse.

Do not smoke cigarettes or drink alcohol. These increase irritation in your stomach and can increase the time it will take for your ulcer to heal.

If you get black, tarry stools or vomit up what looks like coffee grounds, call your doctor or health care professional right away. You may have a bleeding ulcer.

If you need to take an antacid you should take it at least 1 hour before or 1 hour after cimetidine. This medicine will not work as well if taken at the same time as an antacid.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:
  • allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
  • agitation, nervousness, depression, hallucinations
  • breast swelling, tenderness
  • change in sex drive or performance
  • dark urine
  • redness, blistering, peeling or loosening of the skin, including inside the mouth
  • yellowing of the eyes or skin

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from light. Keep container tightly closed. Throw away any unused medicine after the expiration date.

NOTE:This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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Last Updated

March 23, 2009

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