But most people do not have the luxury of laying down during the entire "high". I take meds all day long and have to function so I take Zofran during the day for nausea and promethazine at night, since promethazine is stronger and more sedating to me. I don't feel high anymore when taking my meds, which is why I put it in quotes.
But yes, if someone does not have antihistamines or anti nausea meds then it's best to lay down for about 15 minutes and the worst will pass by then. I was on tramadol for 5 years and it made me sick to my stomach everyday. Methadone did the same in the beginning. So my doctor loads me up on anti nausea medicine. While I don't always need it everyday, it's nice to know I have it, just in case.