What would drinking an entire bottle of nyquil in one go do to a person? What about two bottles?

It would make you incredibly, incredibly sick - instead of giving you the buzz you're looking for. Two bottles might do you in. They put something in NyQuil now to prevent you from ODing on it, and it makes you vomit. I've seen it - red cherry NyQuil puke is not pretty.

I'd advise AGAINST trying to get screwed up with NyQuil.

You need cough syrup with codeine in it to get screwed up.
A bottle of nyquil will make you really sleepy, and it can make you vomit. Given the category that this question is in...maybe if you choke on your own vomit - but it's not likely.

It could poison the person, and even lead to death depending on the age of the person. It will be extremely serious to an infant and the elder.

After one bottle, you would probably trip pretty hard for a few hours. About 18-24 hours later, your liver would fail due to the massive overdose of Tylenol, and you'd have to get a liver transplant, or die a painful death over the course of a few hours. Despite what people say, the amount of Ny-Quil that can kills you isn't as much as it takes to get you to puke.

In fact, if you consume more than 5 full doses of NyQuil, go to the ER. You may actually have no symptoms until it's too late with Tylenol overdose. Don't assume you're fine just because you don't feel sick after your buzz wears off.

In addition, you'll probably spend a week or more locked up in the psychward under suicide watch, regardless of your intent in ingesting the Ny-Quil. It's not a fun time.

you would start vomiting...probably a lot.

Here's a list of overdose symptoms that I found:

"Symptoms of overdose of Nyquil (acetaminophen, dextromethorphan, doxylamine, and pseudoephedrine) include a dry mouth, large pupils, flushing, sweating, nausea, vomiting, diarrhea, abdominal pain, seizures, confusion, an irregular heartbeat, hyperactivity, or hallucinations.-"

However, I hope you're not planning on trying this.

it would make you throw up...

ive drank almost a whole bottle of nyquil and went to school. I did feel like vomiting but never did. I had the same type of high as cccs or mucinex or anything with dxm. Luckly i was just being a stupid kid and never did it again. I felt more sick then tripping. Dont do it.

I have tripped on acid, mushrooms, and peyote. In high school i used to take like 16 Coricidin and have the weirdest worst trip ever! I would be walking down the hall and it felt like the world was tilted sideways, i felt really queezy and could barley even talk. My intestines were bubbling and hurting at the same time, I ended up going home and having the worst diarrhea of my life. I mean seriously i must have been on the toilet for hours and every time i would think i was done more would show up. I couldn't believe the amount, it was ridiculous. Man, it was like green, dark black, and smelled like a dead body that had been rotting in the sun for a week! When i got home i was all alone in my house so i layed down to try to relax and watch TV, but the trip was so intense and it was even more intense when i closed my eyes. The worst part of the whole thing was i thought i was going to die, plus i was tripping. Horrible do not try this at home guys and girls it will be the one of the worst experiences of you life! The only thing i could think of that is worse, is getting shot, or having your family jewels kicked into your stomach! stick to what you know! Smoke a blunt, pop a couple viks or xany's, but always remember not to make it a daily habit cause once your hooked your life will never be the same again, trust me!!!!!!! I wish i never smoked that first joint and fell in love with being high. I can still remember walking thru the woods, and it seemed like everything was flashing like frames or pictures, ya know. It was like i was seeing the world one picture at a time. Ever sense then i have been trying to get that high back but I have not been successful in almost 11 years and never will i get it back again. its like popping your first Vicodin and smoking a blunt of the finest Hydro! That was almost my favorite cause it was like i was floating and i had that super good felling warm sensation in my stomach, and i could feel the "THC and Hydrocodone" pumping thru my body making me feel like i was immortal just riding around Detroit in the summer bangin sounds. Man life was great back then someone needs to make a time machine for real that shit would be awesome!!!!!