"June 29, 2015 -- Medicines that help our immune system fight off tumors are showing early success in a widening variety of cancers.
Some of the drugs, known as immunotherapy, have already been approved to treat several cancers, including ad"...
Promethazine is a phenothiazine derivative which differs structurally from the antipsychotic phenothiazines by the presence of a branched side chain and no ring substitution. It is thought that this configuration is responsible for its relative lack (1/10 that of chlorpromazine) of dopamine antagonist properties.
Promethazine is well absorbed from the gastrointestinal tract. Clinical effects are apparent within 20 minutes after oral administration and generally last four to six hours, although they may persist as long as 12 hours. Promethazine is metabolized by the liver to a variety of compounds; the sulfoxides of promethazine and N-demethylpromethazine are the predominant metabolites appearing in the urine.
Last reviewed on RxList: 6/13/2008
This monograph has been modified to include the generic and brand name in many instances.
Additional Promethazine HCl Information
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