The ingredients are:
Brompheniramine Maleate, USP . . . . . . . . 2 mg/5ml
Pseudoephedrine Hydrochloride, USP . . . . . 30 mg/5ml
Dextromethorphan Hydrobromide, USP . . . 10 mg/5ml
per FDA info
brompheniramine is an antihistamine used to treat symptoms of
allergies
pseudoephedrine is a decongestant used to treat nasal
congestion
dextromethorphan is an antitussive agent (cough suppressant)