Which of the following medications used in the treatment of peptic ulcers and^{gastroesophageal reflux binds to H}2 ^{receptors and blocks the action of histamine on} parietal cells? A) Cimetidine (Tagamet) B) Levbid (hyoscyamine) C) Lotronex (alosetron) D) Nexium (esomeprazole)

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^{Cimetidine is a H}2 ^{receptor blocker used to treat peptic ulcers and GERD. It binds to H}2 receptors and blocks the action of histamine on parietal cells. Levbid and Lotronex are anticholinergics, while Nexium is a proton pump inhibitor that inhibits gastric acid secretion.

Which of the Following Medications Used in the Treatment of Peptic