Let’s start with the main attraction, NyQuil. The active ingredients are: the pain reliever/fever reducer acetaminophen, the same drug in Tylenol; the cough suppressant dextromethorphan, which ...

The ingredient doxylamine in NyQuil also causes drowsiness to help you get rest. Mucinex and NyQuil Cold & Flu are only for people 12 years and older. However, ...

Nyquil contains several active ingredients. Doxylamine is the main ingredient that causes sleepiness. But Nyquil has other ingredients like acetaminophen that can cause side effects.

Many formulations of NyQuil contain acetaminophen, dextromethorphan and doxylamine. If someone ingests too much of any of these ingredients, they could become very ill or die, according to Johnson ...

Sparked by a TikTok challenge that urged users to douse chicken with NyQuil and heat it up, the FDA issued a warning about cooking with over-the-counter medicine.

The ingredient used in common oral decongestants like Sudafed, Allegra, Dayquil, and Nyquil doesn’t provide relief, advisers to the Food and Drug Administration said Tuesday.The Nonprescription ...