Weed helps me with nausea from other factors, but when combined with hydro/oxy I still get a brief bout of nausea, but I've only once had the urge to throw up and I fought it and won solely because I didn't want to throw up the Norcos I had taken 8) and while it wasn't pleasant I'm still here to post lol! Maybe it's just the ROA is unpleasant to you causing you to vomit? To be honest, I kind of enjoy the slight nausea that i get from hydro, but I've never experienced H and it sounds like you're getting pretty ill so if you feel you have to throw up I'd just do it and not try to suppress it. Obviously I will not recommend you continue using H, but I have a feeling that nausea would disappear with tolerance pretty quickly. Hope this helps and I'm not just rambling! Stay Safe!