Sorry to say, my experience with X was not a pleasant one. I was also prescribed by my doctor and was one of the lucky ones to have free coverage through my drug plan. I was on it about 2 months and just got tired of its side effects. if you can be absolutely perfect on plan, then it may work for you...but me I have to indulge once in a blue moon -- and the worry of the terrible side effects was just too stressful. I lost weight whether I was on it or not and being "good" on program, I couldn't really notice much of a difference in terms of weight loss on X.