Weight loss pills

My weight is 258lbs now and would love to get rid of it. I am 31 years old and my height is 5'5. My doctor said that I am overweight. My friend introduced Acomplia to me just last night, which she bought online from http://www.medsheaven.com.
Honestly, my friend Teddy just lost a lot of weight and he told me that he's been taking that pill and going to the gym regularly. Does anybody know the side effects of this pill? Thank you.