Which medication is known as Zantac and is used for acid stomach?

Ranitidine, commonly known by its brand name Zantac, is a medication that belongs to a class of drugs called H2 receptor antagonists. It works by reducing the amount of stomach acid produced by the cells in the lining of the stomach. This makes it effective in treating conditions associated with excess stomach acid, such as gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome.

The effectiveness of ranitidine in managing acid-related disorders is well-documented, which is why it is recognized in this context. While the other medications listed serve important roles in their respective areas—like diphenoxylate/atropine being an antidiarrheal, ondansetron being an antiemetic, and loperamide (Imodium) being used for diarrhea management—they do not target the reduction of stomach acid. Thus, understanding the specific mechanisms of action for each medication helps clarify why ranitidine is the correct answer in the context of treating acid stomach.