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Tagamet

Last reviewed on RxList: 9/26/2016
Tagamet Side Effects Center

Last reviewed on RxList 9/21/2016

Tagamet (cimetidine) is a histamine receptor antagonist used to treat and prevent certain types of ulcer, and to treat conditions that cause the stomach to produce too much acid. Tagamet is also used to treat gastroesophageal reflux disease (GERD), when stomach acid backs up into the esophagus and causes heartburn. Tagamet is available in generic form. Common side effects of Tagamet include:

  • headache,
  • dizziness,
  • drowsiness,
  • depression,
  • agitation,
  • breast swelling or tenderness (in men),
  • joint or muscle pain,
  • skin rash,
  • diarrhea,
  • nausea, or
  • constipation.

Tell your doctor if you experience unlikely but serious side effects of Tagamet including:

  • mental/mood changes (e.g., confusion, hallucinations),
  • trouble urinating, or
  • decreased sexual ability (with very high doses).

Dose of Tagamet depends on the condition being treated and the patient's response to the medication. Tagamet may interact with blood thinners, clopidogrel, phenytoin, nifedipine, metronidazole, propranolol, chlordiazepoxide, lidocaine, diazepam, theophylline, depression or anxiety medications. Tell your doctor all medications you use. Tagamet should be used only when prescribed during pregnancy. This medication passes into breast milk. Consult your doctor before breastfeeding.

Our Tagamet (cimetidine) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Tagamet Consumer Information

Stop using cimetidine and get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

  • cough, fever, chest congestion, trouble breathing;
  • red or blistering skin rash;
  • jaundice (yellowing of the skin or eyes);
  • easy bruising or bleeding, unusual weakness;
  • feeling faint, light-headed, disoriented, or confused;
  • urinating less than usual;
  • irregular heartbeat; or
  • a rash.

Less serious side effects may include:

  • feeling dizzy, depressed, or agitated;
  • breast swelling or tenderness (in men);
  • joint or muscle pain;
  • mild skin rash;
  • headache; or
  • diarrhea, nausea, or constipation.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Tagamet (Cimetidine)

Tagamet Professional Information

SIDE EFFECTS

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Read the entire FDA prescribing information for Tagamet (Cimetidine)

Related Resources for Tagamet

Read the Tagamet User Reviews »

© Tagamet Patient Information is supplied by Cerner Multum, Inc. and Tagamet Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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