NCI Drug Dictionary

The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

meclizine hydrochloride
The hydrochloride salt form of meclizine, a synthetic piperazine with anti-emetic, sedative and histamine H1 antagonistic properties. Meclizine hydrochloride blocks the H1 histamine receptor and prevents the symptoms that are caused by histamine activity on capillaries, bronchial and gastrointestinal smooth muscles, including vasodilation, increased capillary permeability, bronchoconstriction, and spasmodic contraction of gastrointestinal smooth muscles. Meclizine hydrochloride may exert its antiemetic effects by its anticholinergic actions or due to a direct effect on the medullary chemoreceptive trigger zone. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:meclizine dihydrochloride monohydrate
meclizine HCl
US brand name:Antivert
Chemical structure:1-[(4-chlorophenyl)phenylmethyl]-4-[(3-methylphenyl)methyl]piperazine dihydrochloride monohydrate