Promezin (Promethazine Hydrochloride) 25mg/ml Solution for Injection is an antihistamine used to treat allergic reactions, nausea, vomiting, motion sickness, and sedation. It works by blocking histamine receptors to relieve symptoms. Administered via intramuscular (IM) or intravenous (IV) injection under medical supervision. Each pack contains 10 ampoules of 2ml.