Oh my apologies for the misunderstanding, I didn't know that birth control could hold other benefits too.
Birth control holds so many benefits for girls it's kind of surprising not every girl takes it. There's the obvious factor that it prevents pregnancy, which is debatable whether or not it's a good thing but that's a discussion for another place. Then there's tons of other benefits that come from the stabilization of hormones, chiefly the stabilization of menstrual cycles and elimination of problems caused by hormonal fluctuations including mood swings, acne, cramps, etc. Obviously BC doesn't solve all of these problems for all girls, but it's a common first-line method at solving these problems.
Also, I'm not sure anybody can go to the doctor and get prescribed antiemetics. They're not really prone to abuse but they could easily become habit forming if used in excess to combat potential nausea. Like all other prescription drugs, you probably need a good reason to get prescribed antiemetics which in Bubbagum's case would be her BC-induced nausea. Complaining about frequent nausea would probably prompt a doctor to look into why you're getting that symptom rather than simply trying to rid you of that symptom, which in the case of a fraudulent claim would obviously be a bad thing. I always exercise caution when requesting specific drugs from doctors, they generally become weary when you know what you want when you walk into their office.