alright well first of all, DXM is alot differnt that other drugs. It doesnt work like pot where u just get a high that increases as u increase the dosage. It goes is stages. Their are 4 plateus(or levels of high) that u actaully get. The first one is just a mild drunk feeling, pretty clear headed. The second plateu is a really stoned/drunk feeling with sum like 2-D halicunations kinda like u get when ur stoned off u ass from pot. However i dont really like the first two beacuse theirs not really any euphoric feelings, at least i dont get them(some people do tho). The 3rd plateu is where things change completly. This is when DXM truly becomes a haliucinigen and u will for real start to trip. Im talking people coming out of the TV, trails, colors and stuff bending, and it can be a really cool expierence. I dont know much about the 4th level cuz its such a high dose have ive never reached that point but its suppose to be soooo freaking intense. If you only drank half of the bottel that wud be 400 mg of DXM. thats enuff for a beginnig 2nd plateu dose most likely. If i were u I wud drink half the bottle first, then wait say 30 min, and then drink almost all of the rest, so u get about 700mg of DXM. You should be tripping out of ur mind at that on a 3rd plateu. Remeber tho DXM is sensitive to your weight, so if u dont weigh much it might not take that much. I weight about 135 and 700-800 and i trip balls. Sorry that was so long but it need to be said. Safe tripping. Peace.