Acetaminophen is used to relieve pain and reduce fever. Chlorpheniramine (CPM) is an antihistamine that helps relieve symptoms such as watery eyes; itchy eyes, nose, throat; runny nose; and sneezing. Dextromethorphan (DM) is a cough suppressant that reduces the urge to cough by affecting certain part of the brain. Pseudoephedrine is a decongestant that relieves nasal congestion by shrinking the blood vessels in the nasal passages.