com/diet/hcg-and-weight-loss 15-20 lbs in a months is not a very realistic goal, to lose weight safely and while you might be able to accomplish that with the phentermine, it's a pretty sure bet you won't be able to keep it off. I was taking Phentermine for a month and I lost 17 pounds. About 3 days after I went off Phentermine and I noticed a 2 pound increase in my weight. To keep weight off after any type weight-loss program, healthy eating habits are needed. Avoiding junk food and eating lean cuts of meat, whole grains, the correct amount of fats and dairy. To continue losing weight after Duromine discontinuation, follow simple and clear tips and be sure to dedicate time to physical activities. Active lifestyle not only saves your normal body weight, but also helps you stay active and energetic throughout the day. It still works on that day off and it helps to lose the weight a little slower in order to have a better possibility of keeping it off. After you go off of phentermine expect to gain 3-5 pounds back. Your metabolism is slowing down. There are side affects to this drug just like any other. If yours are heightened and sever then obviously this drug is not for you. Not everyone can take every drug. I have just lost 65 lbs using phentermine 37.5 mg. I am determined to keep this weight off and lose another 25 lbs without it. I was 209 and now I am 144 lbs I want to lose 25 more lbs. I recommend weight watchers while taking it, so you put enough food in your body so that when you do come off the pills, your body isn't used to basically starving to lose weight. You will never keep the weight off without eating healthy. The truth is that, if you want to keep weight off, the cards are stacked against you: Your brain and your body are hard-wired to regain lost weight. Unlimited recording storage space. Live TV from 60+ channels. No cable box required. Cancel anytime.