Zantac 150 mg is composed of the active ingredient ranitidine hydrochloride, a histamine H-2 receptor antagonist, according to RxList.com. Zantac treats a variety of disorders including duodenal ulcer, benign gastric ulcer and Zollinger-Ellinson syndrome. Side effects of Zantac include headache, arrhythmia, blood count fluctuations, pneumonia, gastrointestinal discomfort and blurred vision.
Headache
A headache may occur with Zantac 150 mg use, according to RxList.com. The headache pain may be severe.
Arrhythmia
Cardiac disorders may occur with Zantac 150 mg use, notes RxList.com. Heart arrhythmias may occur in some patients.
Blood Count Fluctuations
A side effect of Zantac 150 mg may be fluctuations in blood count levels. This drug may impact the quantity and type of cells in the bloodstream.
Pneumonia
Pneumonia is one of the more serious side effects of Zantac 150 mg use. RxList.com notes that some patients are diagnosed with pneumonia while taking this drug.
Gastrointestinal Discomfort
Zantac 150 mg use may cause nausea and vomiting, and other types of gastrointestinal discomfort. These symptoms may be ongoing or sporadic.
Blurred Vision
Vision changes may occur with Zantac 150 mg treatment, according to eMedTV.com. Zantac may cause blurred vision.
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