migraine
"This was hugely helpful for me when my doctor figured out that I was suffering from migraines. Once in a while, I get sick to my stomach before the medication takes effect (especially if I've delayed taking it, for whatever reason), but I can't describe how much better it is to have this than to suffer. If I lose a dose to emesis, I'll take another with a small amount of water and wait for everything to calm down. Keeps me functional, where before I'd have been wiped out and wishing for death for a day or more. Side effects for me have been very mild and occasional. Slight tingly feelings, or a little bit of mental "distance" from my surroundings. Words can't describe how much better this is than torture."