the only time I ever puked on 2ce was the first time my girl friend took it with me. (snorted) She got pretty overwhelmed when my carpet turned into a sheet of lizards lol
She started to throw up...and up....and uppp.... and I finally had to as well just from seeing and hearing it so much lol, it's the only time I've ever come close. And once I came back (she was still heaving) I just told her 'hey, look at the computer screen, you don't have to throw up, it's all in your head', and she stopped =)
I've definitely found all the nausea to be mental, I'll start to think about it, and the second I do the pain in my stomach will start to build and build more and more as I and just swell up..then I'll just focus on something else and it's gone like that.
I've only snorted the stuff though, so I don't know about oral dosing. My biggest complaint was the muscle tremors, SEVERE uncontrollable muscle tremors. Or so I thought. I had read a report of someone recommending to lay down during the come up, so I gave it a shot. Last time I put away a good 14mg, and right after got the nose back in check I crawled into bed and just kind of buried myself in blankets and told myself to get comfortable enough that I could just fall asleep. I got up out of bed after probably not even 10 minutes and felt completely reborn! That trip went on to be the cleanest one yet on e, I didn't have any of tremors or tension or uncomfortable/worrysome feelings the the heart.