Acetaminophen is a pain reliever and fever reducer.
Doxylamine is an antihistamine that reduces the natural chemical histamine in the body.
Histamine can produce symptoms such as sneezing, runny nose, and watery eyes.
Dextromethorphan is a cough suppressant. It affects the cough reflex in the brain that triggers
coughing.
Pseudoephedrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated
blood vessels can cause nasal congestion (stuffy nose).
The combination of acetaminophen, dextromethorphan, doxylamine, and pseudoephedrine is
used to treat runny or stuffy nose, sinus congestion, cough, and pain or fever caused by the common
cold, allergies, or the flu.
Dextromethorphan will not treat a cough that is caused by smoking.
Acetaminophen, dextromethorphan, doxylamine, and pseudoephedrine may also be used for
other purposes not listed in this medication guide.