- What is cimetidine, and how does it work (mechanism of action)?
- What brand names are available for cimetidine?
- Is cimetidine available as a generic drug?
- Do I need a prescription for cimetidine?
- What are the side effects of cimetidine?
- What is the dosage for cimetidine?
- Which drugs or supplements interact with cimetidine?
- Is cimetidine safe to take if I'm pregnant or breastfeeding?
- What else should I know about cimetidine?
What is cimetidine, and how does it work (mechanism of action)?
Cimetidine is a drug that blocks the production of acid by acid-producing cells in the stomach and can be administered orally, IM or IV. It belongs to a class of drugs called H2 (histamine-2) blockers that also includes ranitidine (Zantac), nizatidine (Axid), and famotidine (Pepcid). Histamine is a naturally-occurring chemical that stimulates cells in the stomach (parietal cells) to produce acid. H2-blockers inhibit the action of histamine on the cells, thus reducing the production of acid by the stomach. Since excessive stomach acid can damage the esophagus, stomach, and duodenum by reflux and lead to inflammation and ulceration, reducing stomach acid prevents and allows acid-induced inflammation and ulcers to heal. Cimetidine was approved by the FDA in 1977.
What brand names are available for cimetidine?
Is cimetidine available as a generic drug?
GENERIC AVAILABLE: Yes
Do I need a prescription for cimetidine?
Yes and OTC (Heart Burn)
What are the side effects of cimetidine?
Side effects due to cimetidine are rare and generally reversible once the medication is stopped. Minor side effects include:
Major side effects include confusion and hallucinations (usually in elderly or critically ill patients), enlargement of the breasts; impotence (usually seen in patients on high doses for prolonged periods); decreased white blood cell counts.
Other side effects include:
Quick GuideHeartburn: Causes, Symptoms, Remedies, Treatments
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