Every person reacts very differently to medications so I wouldn't consult too much with others at this point. The good thing is you know what to look for which can only help. It can help you not care so much about your weight that you eat more or stop purging. It may not feel like an impulse to you buy in some ways it is, similar to how self harm is an impulse. If it wasn't people wouls use their better judgement and possibly not do it. So I would not worry so much and see how it affects you