Codeine is one of the naturally occurring phenanthrene alkaloids of opium derived from the opium poppy; it is classified pharmacologically as a narcotic analgesic. Codeine phosphate may be chemically designated as 7,8-Didehydro-4,5α-epoxy-3-methoxy-17-methylmorphinan-6α -ol phosphate (1:1)(salt) hemihydrate. Visit For More: https://anxietymedstore.com/our-products/promethazine-cough-syrup/