I have to stay up for about 22-24 hours straight so I can reset my sleep schedule. I've been up for 11 hours and I don't feel tired yet. I'm afraid because every time I do this, I get nauseated horribly, even if i were to take 75mg 2 hours before I sleep, when I try to sleep. I saved 8mg of Zofran and I still have Promethazine... I just would like to know how to curve off nausea for the rest of my day unto sleep. I'll take a promethazine 25mg later today around 11am and go out shopping to keep me from getting too tired. I won't eat heavily and I'll drink ginger ale only. Any advice?