Ranitidine hydrochloride is an organic compound with the molecular formula of c13h23cln4o3s. It is white or light yellow crystalline powder, with odor, slightly bitter and astringent taste. Easy to absorb moisture. Soluble in methanol or water or acetic acid, slightly soluble in ethanol, almost insoluble in chloroform or acetone.  It is a histamine H2 receptor antagonist. It can also inhibit the secretion of pepsin. Its acid inhibition intensity is 5-8 times stronger than that of cimetidine.
People often take prescription ranitidine to treat:
· Duodenal ulcers
· Gastric ulcers (stomach ulcers)
Over-the-counter ranitidine is approved for the following conditions:
· Acid indigestion
· Sour stomach.
Ranitidine comes in the form of a tablet and is taken one to four times a day, depending on the condition being treated. It belongs to a class of drugs known as H2 blockers