endometriosis
"I've been taking this medication for a year now and was hoping I'd get used to it but no luck.  It did initially help with the wicked menstrual cramps I'd get on day 2 (vomiting from pain) but I can't take enough of it due to the side effects.  I can only take it on the weekend, then it ruins my whole weekend.  I feel tired, dizzy, can't think clearly, clumsy, and kinda drunk. It also stays in my system a really long time, 24-36 hour half life so I'm drunk and dizzy for that long.  Bummer because it doesn't make me feel nauseous at all, like the pill does.  Still, I may try the birth control pill instead.  Can't really function on this and not sure I should be driving, much less working on it."