Serious H2 Blocker Side Effects
There are a number of less common, but more serious, side effects of H2 blockers that you should report immediately to your healthcare provider. These include but are not limited to:
- Low levels of white blood cells
- A slow heart rate (bradycardia), fast heart rate (tachycardia), or irregular heart rhythm (arrhythmia)
- Depression, confusion, agitation, or hallucinations
- Symptoms of liver problems or hepatitis, including yellowing of the eyes or skin, pain in the upper right side of the abdomen, and dark urine
- Angioedema (life-threatening swelling of the throat and mouth)
- Signs of an allergic reaction, including an unusual rash, hives, itching, wheezing, trouble breathing, or swelling of the mouth or throat.
A Summary of H2 Blocker Side Effects
It is possible that you may experience some or none of these H2 blocker side effects explained above. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have side effects from a medicine that you have never tried. Therefore, make sure to let your healthcare provider know if you develop any side effects during treatment with an H2 blocker. You should also let your healthcare provider know if you develop something that "just does not seem right." While it may not be a side effect of your H2 blocker, your healthcare provider will be able to diagnose and treat the problem.
You can also read about specific side effects for each individual H2 blocker by going to the specific drug within eMedTV.
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