Long-term nasal congestion and headache are treated by pseudoephedrine. Acetaminophen reduces pain. Acetaminophen reduces pain by preventing production of chemicals called prostaglandins. This decreases pain.
Pseudoephedrine shrinks swollen nasal tissue and opens up passages.
Sinus drainage is increased by this. Take on an empty stomach. Take 1 hour before or 2 hours after meals. This medicine is most effective if started before contact with the allergen. Take at least 1-3 hours before.