Do not take more than four doses in 24 hours. See the directions on the box for the correct dosage for adults and children. Nyquil should not be used as a sleep aid. A 2015 review concluded there ...

Acetaminophen 500mg, doxylamine succinate 6.25mg, dextromethorphan HBr 15mg, pseudoephedrine HCl 30mg; per 15mL; liq; contains sodium 18mg/15mL. See Contraindications. Hypertensive crisis with ...