What is Promethazine hydrochloride and codeine phosphate?

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What is Promethazine hydrochloride and codeine phosphate?

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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.

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