Ranitidine hydrochloride is a medication belonging to the class of histamine H2 receptor antagonists. It is commonly used to reduce the production of stomach acid and treat conditions such as ulcers, gastroesophageal reflux disease (GERD), and Zollinger-Ellison syndrome. Ranitidine hydrochloride works by blocking the histamine receptors in the stomach, thereby decreasing the amount of acid produced. It provides relief from symptoms like heartburn, indigestion, and stomach pain. Ranitidine hydrochloride is available in various forms, including tablets, oral solutions, and injectables. It should be used as directed by a healthcare professional, and possible side effects or interactions should be discussed prior to use.