What is Promethazine hydrochloride and codeine phosphate?
Promethazine, when combined with codeine, is used to relieve coughs and other symptoms of allergies and the common cold, including hives and nasal congestion. Promethazine is a phenothiazine antihistamine. It works by blocking the sites where histamine acts. Codeine, a narcotic analgesic, helps relieve pain and stops coughing.