chlorpheniramine, hydrocodone, and pseudoephedrine
Chlorpheniramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. Hydrocodone is a narcotic cough suppressant. It affects the signals in the brain that trigger cough reflex. Pseudoephedrine is a...