Promethazine with codeine syrup is indicated for the temporary relief of coughs and upper respiratory tract symptoms related to allergies or the common cold. Promethazine is an antihistamine, similar to products available over-the-counter like Benadryl, Claritin, Zyrtec, and Allegra. Antihistamines are typically used to treat the symptoms associated with the allergies and the common cold—they […]