<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been struggling with my weight for a long time now, and I have tried many diet and exercise programs, but nothing seems to be working.  <response>: It sounds like you may be suffering from obesity. I recommend a combination of medications including Phentermine, Orlistat, and Sibutramine. These medications have been shown to be effective in aiding weight loss efforts. 