I have been trying to figure out what my healthy body weight should be. I was recently informed that you should not go by your body weight but by your total body fat. I currently am about 150 lb. with total body fat of 22%, is this considered “healthy”? I have a major fear that I will regain the 66 lb. that I lost nearly a year ago. My diet consisted of 45-60 minutes of aerobic exercise at least 6 times a week, less than 20 grams of fat each day, about 80 oz. of water and one (37.5 milligrams) phentermine pill. The weight came off in about four months. At one point in time I had gotten down to 145, but I have also reached 165 in recent weeks. I am trying to get back down to 145 because I feel comfortable at that weight. I had one prescription left over for the phentermine and I began the ritual again. Now I have 13 pills left and 10 more lb. to go. The concern is that I have tried to stop taking the pills and have had several strange things happen, for example if I don’t take the phentermine one day, the next morning I cannot hear my alarm, I wake up and feel tired, grouchy and to put it bluntly…..a real*!#@# – I am scared that if I do not take the pills I will not focus on my diet and in turn will not lose the 10 lb. I hope too! Is there anything I can do to give my body some extra energy? I am sorry I take so long to get to the question but I wanted to make you as informed as possible about my weight history. Thank you very much. I am eagerly awaiting a response!!