Serious and Rare Reactions to Tagamet

Side Effects to Report

There are a number of less common but more serious side effects of Tagamet that you should report immediately to your healthcare provider. These include but are not limited to:
  • Low levels of white blood cells
  • Slow heart rate (bradycardia) or fast heart rate (tachycardia)
  • Irregular heart rhythm (arrhythmia)
  • Confusion, agitation, or hallucinations
  • Symptoms of liver problems or hepatitis, including:
    • Yellowing of the eyes or skin (jaundice)
    • Pain in the upper right side of the abdomen (stomach)
    • Dark urine
  • Signs of an allergic reaction, including:
    • An unusual rash
    • Hives
    • Itching
    • Wheezing
    • Trouble breathing
    • Swelling of the mouth or throat.

Rare Tagamet Side Effects

Some reported side effects of Tagamet occur so infrequently that it is difficult to tell if they are actually caused by the medication or something else. These problems include but are not limited to:

Final Thoughts

You may experience some or none of the Tagamet side effects listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have problems with a medicine that you have never tried.
Therefore, make sure to let your healthcare provider know if you develop any side effects while taking Tagamet. Also, let your healthcare provider know if you develop something that "just does not seem right." While it may not be related to the medication, your healthcare provider should be able to diagnose and treat the problem.

Tagamet Drug Information

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