Promethazine Health Dictionary

An antihistamine drug used to relieve itching in a variety of skin conditions, such as eczema.

It is also used as an antiemetic drug, and sometimes as a premedication.

Possible adverse effects include dry mouth, blurred vision, and drowsiness.

n. a powerful *antihistamine drug used to treat allergic conditions and – because of its sedative action – insomnia; it is also used as a premedication and an *antiemetic. Side-effects include drowsiness, dizziness, and confusion.