Promethazine Hydrochloride: Uses, Dosage, Side Effects, and Safety Guide What Is Promethazine Hydrochloride? Promethazine Hydrochloride is a prescription medication primarily used to treat allergic conditions and nausea-related symptoms. It works by blocking histamine receptors in the body and calming the brain’s vomiting center. Doctors often prescribe Promethazine Hydrochloride to treat conditions such as: Seasonal allergies […]
