What are the side effects of Zantac?


Quick Answer

Potential side effects of Zantac, or ranitidine, include headache, constipation, diarrhea, stomach pain and nausea, according to MedlinePlus. Patients should notify a doctor of any side effects that are severe or persistent.

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Full Answer

Classified as an H2 receptor blocker, Zantac works by decreasing the amount of acid produced by the stomach, states MedlinePlus. Zantac treats ulcers, gastroesophageal reflux disease and certain medical conditions that cause overproduction of stomach acid. It also prevents and treats heartburn related to acid indigestion and sour stomach. Zantac is available with or without a prescription, and is generally taken one to four times daily. It's most effective at preventing symptoms when taken 30 to 60 minutes before eating.

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