I think you should consider it regardless of your weight. You will be able to take physical therapy as your heal and when you get to a point where the pain is less then maybe you will be able to walk more and move towards your weight loss goals. Have you ever considered gastric bypass or is your weight not related to what you eat and purely related to the med? I had GP 10 years ago and have managed to keep all but 15lbs off. It was the best thing I ever did for myself.