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What are H2 blockers?


H2-receptor blockers are a group of medications that prevent the release of stomach acid and are used to treat heartburn and ulcer. They include Tagamet®, (cimetidine), Zantac® (ranitidine), Pepcid® (famotidine) and Axid® (nizatidine). These drugs are available over the counter in low doses to treat minor heartburn. They're prescribed in higher doses to treat a more severe type of heartburn called reflux disease (also called gastroesophageal reflux disease, or GERD), stomach ulcers, and intestinal ulcers. People tolerate these medicines well, reporting few side effects. The most commonly reported side effects include mild drowsiness, confusion, rash, fatigue, headache, diarrhea, and constipation. Be sure to talk with your doctor if you experience any unusual or more severe reactions to these medications.

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Answers to questions regarding information about medications or health conditions are not for diagnostic or treatment purposes and are not conclusive as to the presence or absence of any health condition. Consult your physician for diagnosis and treatment of your medical condition. The information provided is not a substitute for medical advice. Advances in medicine may cause this information to become outdated, invalid or subject to debate. Professional opinions and interpretations of the scientific literature may vary. Walgreens' terms of use and general warranty disclaimer apply to all services provided. If you are in need of immediate medical attention, contact your physician, poison control center or emergency medical professional. If you need to speak with a pharmacist for non-emergency matters, contact your local Walgreens pharmacist or call a pharmacist toll-free at 1 (877) 250-5823.

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