What weight loss pill can i use that doesn't harm me. i am 20 years old looking too lose 15-25 lbs and of course with excersise?

No such pill: All medications have potential side effects, especially weight loss medications. I would not recommend a medication for this amount of weight loss. In fact I would recommend you speak with your physician and a dietician about coming up with a healthy plan for losing weight and deciding what level of weight loss is appropriate based on your height and weight.