well it depends on da type of drugs they put in ur body and if ur susceptible to get a virus/disease then dat means ur doctor's not supposed to give u dat type of medicine or else u could possibly die from it but it's less likely to hurt ur body if ur given a llegal drug. I hope dis helps :3
Yes, depending on the perspective. If it's going to be because they want you to, than no. If it's going to be a continuous thing to lose weight, get in shape, etc, than yes.