Acetaminophen is used to decrease pain. Pseudoephedrine is used to dry up nasal stuffiness. Acetaminophen decreases the production of chemicals called prostaglandins. This decreases pain.
Pseudoephedrine shrinks swollen nasal tissue and opens up passages.
This increases sinus drainage. Do not take more than prescribed amount. Liver damage can occur. Make sure you are drinking enough liquids unless told to drink less by healthcare provider. Avoid products with caffeine.