Chlorpheniramine is an antihistamine that reduces the natural chemical histamine in the
body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.
Hydrocodone is a narcotic. It is a pain reliever and a cough suppressant.
Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated
blood vessels can cause nasal congestion (stuffy nose).
The combination of chlorpheniramine, hydrocodone, and phenylephrine is used to treat
runny or stuffy nose, sinus congestion, and cough caused by the common cold or flu.
Chlorpheniramine, hydrocodone, and phenylephrine may also be used for other purposes
not listed in this medication guide.