how long does Nyquil stay in the digestive system?

Answer 1

Are you asking how long it stays in our stomach or how long the nyquil works?

Once it's in your stomach it works it's way into your blood stream where it works for 6-8 hours. It takes 3-4 hours before the actual liquid is absorbed by your stomach acid.

Answer 2

Nyquil being mostly alcohol and water is absorbed fairly quickly, probably leaves the digestive tract and enters the blood stream in about thirty minutes.