how much nyquil gets you high
The problem with drinking Nyquil to get high, other than that its dangerous, is that it has the same effect on you that alcohol would. If you drink 3/4 of the bottle you will be very drunk and most likely sick and sleepy.
Nyquil is used to relieve various symptoms for cold. Large intake of this drug above its recommended dosage will make you feel high due to its alcohol and antihistamine contents.