A salt formed by combining a chemical compound with hydrochloric acid; often used in pharmaceutical formulations of drugs.
From chlor- (from hydrochloric acid) + hydrate (water compound). Older term from 19th-century chemistry; largely replaced by 'hydrochloride' in modern usage.
Many prescription drugs are actually the 'chlorhydrate' or hydrochloride form—this salt version helps the drug dissolve properly in the body and makes it stable enough to store for years on a pharmacy shelf.
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