What is codeine, phenylephrine, and promethazine?
Codeine is a narcotic. It is a pain reliever and a cough suppressant. Promethazine is an antihistamine. It blocks the effects of the naturally occurring chemical histamine in your body. Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose). The combination of codeine, phenylephrine, and promethazine is used to treat cold or allergy symptoms such as stuffy nose, sneezing, and cough. Codeine, phenylephrine, and promethazine may also be used for other purposes not listed in this medication guide.
