Requires Prescription (YES/NO)
Yes
Generics
Promethazine HCl
Used For
Allergy
How it works
It contain a medicine called promethazine hydrochloride. This belongs to a group of medicines called phenothiazines. It works by blocking a natural substance (histamine) that your body makes during an allergic reaction. It also works directly on the brain to help you feel more relaxed.