Weight loss pills

I've been trying to lose weight for at least 6 months now. I've struggled so much. The most I've lost is ten pounds (within 2 months) and I gained it right back. I've been doing low carb, going to the gym, sometimes no carb and I've been juicing. I want to ask my doctor if she would feel okay prescribing me weight loss pills. But I'm not sure what the best kind is or which ones have the most side effects. I've been doing research but I haven't found anything that helps.