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How To Not Gain Weight After Phentermine

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Check out the ultimate guide to phentermine weight loss pills!

Losing weight is hard, even with the help of phentermine, but researchers into long-term dieting success have found that 80 percent of people who lose weight gain it back again! So, if this scary statistic is anything to go by, is maintaining your weight even harder? Here we explain what you can do to not gain weight back after phentermine, and make sure that you’re one of the 20 percent who keep the weight off for good!

Start As You Mean To Go On

If your weight loss is built to last, you need to make sure that you lay the right foundations, which means thinking ahead to long-term weight maintenance right from the very start of your weight loss journey with phentermine. The best approach is to view your time taking phentermine as a training period. Phentermine isn’t a miracle pill that magically zaps away fat (as much as we would like it to be!), it’s more of a kick-start to get you on the right track when it comes to eating healthily and being more active. So, while you’re taking phentermine, use the added boost of energy that it gives you to find an exercise that you genuinely enjoy – that way you’ll be much more likely to want to continue even when you’ve reached your goal weight.

The same goes for starting to eat healthily; by reducing your appetite, phentermine gives you the opportunity to learn to recognize which foods keep you feeling full for longer, which boost your energy, and which foods leave you feeling bloated and lethargic. Losing weight requires you to make good habits, such as never skipping breakfast, drinking plenty of water, and taking a packed lunch to work instead of eating out, but these are habits that have to continue if you’re going to avoid weight gain after phentermine. While you might think that you can loosen the reigns a little when it comes to maintaining, it’s all too easy to slip into your old ways and gain weight back after phentermine if you relax too much, as many of our phentermine forum users have reported. If you’re determined to make this your final time losing weight with phentermine, then you have stop thinking short-term; remove the word ‘diet’ from your vocabulary and think beyond the finishing line because a healthy lifestyle is for good and not just until you reach a certain number on the scale.

How To Not Gain Weight Back After Phentermine

If you’re at or close to your goal weight then these tips will help you to not gain weight back after phentermine:

1. Weigh Yourself Weekly

Maintaining your weight is a balancing act, so while you may lose a little one week, you may gain weight another week. These kind of fluctuations are normal and may just be as a result of bloating during your period or a salty meal the night before you weigh in. However, making sure to keep track of these ups and downs – and be stricter with yourself if there are more ups than downs – is the key to keeping your weight steady in the long term as it’s much easier to lose an extra pound or two than it will be to shed those stubborn last ten pounds again.

2. Plan Ahead

If you’ve been following a set food plan to lose weight then it can be daunting to go back to eating without guidelines, which is why it’s actually a good idea to stick to a maintenance plan to help you to not gain weight back after phentermine. The best eating plan is one which you can imagine yourself continuing forever without feeling deprived, so base it around what you were eating to lose weight with slightly more freedom to enjoy the foods you love, but keep everything in moderation. Think about meals individually and plan ahead by shopping in bulk where possible, and cooking in batches to ensure that your freezer is always full of home-cooked meals so resorting to take outs isn’t the go-to option when you come home late from work.

3. Calculate Your Calorie Limit

Just as there is no one-size-fits-all diet plan that suits everyone, the amount of calories you can eat per day in order to lose weight with phentermine depends on many individual differences, and the same goes for how many calories you can eat to maintain. The best way to work out your limit is by slowly adding around 100 calories extra per day for a week to what you were eating to lose and then if you reach a point where you gain weight, you know you should drop your daily calories back down. Although it might take you a while to discover your limit, it’s more effective than following a general guide that doesn’t take into account your activity level and other factors specific to you.

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4. Eat Filling Foods

Of course, not all calories are created equally; the extra foods you allow yourself should still be nutritious and with the aim of keeping you full for longer to make it easier to resist cravings. So, avoid foods with empty calories, trans fats and preservatives like cakes, candy, ready meals and chips, and instead opt for fresh fruit and veg, legumes, nuts and seeds, whole grain carbs, and lean protein. However, treating yourself now and again is all part of developing a healthy relationship with food, so feel free to indulge in your old favorites now and again.

5. Continue Exercising

Research into long-term weight-loss success has found that you’re much less likely to gain weight back if you exercise while you are losing weight and continue to exercise while you’re maintaining. Exercise comes with a whole host of physical and mental benefits, including greater self-esteem, and many of the contributors to our Phentermine Success Stories report that once they started becoming more active, they were happier sticking to it than going back to their old sedentary lives. So, remember to take a step back to really take in how much better you feel thanks to being more active – it’s a great way to inspire your future self into keeping it up and helping you to not gain weight back after phentermine.

6. Lead A Healthy Lifestyle

Losing weight isn’t just about diet and exercise; other aspects of your life, such as getting enough sleep, taking steps to manage stress, being organized, getting your vitamins, and maintaining good relationships with those important to you all help you to achieve the balance that you might not have had previously. So, be sure to take a holistic approach to maintaining your weight as it’s much easier to focus and not gain weight when you’re leading a healthy lifestyle.

7. Be Prepared To Lose Weight Again

Just as slip-ups can happen while you are losing weight with phentermine, you might find that maintaining your weight loss after phentermine is more difficult than you had hoped. It is beneficial to acknowledge that you may gain weight once you finish, and as it’s far easier to lose a couple of extra pounds than ten, it’s crucial to catch any weight gain before it gets out of control. In fact, one of the most common withdrawal symptoms of phentermine is weight gain, which may be due to suddenly not having the effects of appetite suppression and added energy which you had come to rely on. For this reason we recommend Phen Caps for those maintaining their phentermine weight loss; like phentermine, Phen Caps reduce cravings and suppress appetite while also giving you a boost of energy in order to help you maintain your weight loss. Phen Caps are available online without prescription and as they have no risks to health and no side effects, they can be taken for as long as you feel necessary to help you to consolidate your weight loss.

Are you worried about gaining the weight back after phentermine? Or, have you gained weight following your phentermine prescription? Let us know by commenting below!


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30 Responses

  1. I have gained so much weight back after phentermine. It’s happening fast I don’t wanna keep starting and stopping I need consistency.

    • Hi Candice,
      I’m sorry to hear that you’re putting weight back on after stopping phentermine. Have you tried asking your doctor for additional weight loss support, such as counselling or diet plans? Phentermine isn’t suitable for long term use so it is necessary to find a way to maintain a healthy lifestyle without phentermine, but added support is often needed for those who have ongoing problems with their weight.

  2. I have lost 50lbs with the help of Phentermine. It took me a year. My doctor told me, after the third month, that most people would have given up by now. I look wonderful and feel great. I have all new clothes (size 6) and have gotten rid of the ones that don’t fit me any longer. I’m trying to step off of it now. I don’t know what I’d do if I gained it back.

  3. hey,

    Thank you for this.

  4. I lost weight with phentramine 2 years ago, I have gained it back and then some. However I tried phentramine and it’s just not working anymore. Why did it stop?

    • Hi Monica,
      Are you referring to the prescription medication phentermine or the weight loss supplement phentramine? They have similar names but are different products entirely. If you’re taking phentermine prescribed by your doctor then you should ask to see if you can try a different brand or manufacturer as this can effect how well your body metabolizes the drug.

  5. I am just at the end of menopause at age 54 and Phentermine not only helped with stubborn weight loss but also with the mood changes that go along with menopause. I learned that I needed to reduce my coffee intake and it helped tremendously with the moodiness that can occur on Phentermine. However I have been on and then off of Phentermine and each time off I started to gain weight back. Unfortunately the doctor I had told me that my body is a 160lb body and I will never be able to keep the weight off. I went from 163lb to 142lb and then put most of if back on in the last 2 years. I stopped going to the Dr. because he made me feel less about the struggle so I am looking for a new doctor. It was nice to have the apt, Phentermine and LypoB shot covered by my insurance. I only had to pay $10 for the Phentermine and $10 for the Lypo B shot. But I can’t be under a doctor who is impatient and not sincerely caring for his patients.

    • Hi Lynn,
      We’re sorry that you had a bad experience with your doctor. It could be said that most people have a natural weight range which relates to their height, but food intake and exercise can be adjusted to help you keep off the weight you lost in the long term. To have a ‘160lb body’ you would have to be at least 5’8″ tall and even then your weight might not distributed in a healthy way (such as if it is predominantly around the stomach area). We hope you find a doctor who can advise you better and give you the help you need to keep the weight off for good.

  6. Phentermine is the worst diet pill I have ever taken in my life – not only did I gain the weight back but my hair fell out. Hair loss is one of the side effects that Phentermine does not list. Your hair gets damaged and breaks off but you don’t notice it until months after because it sits on the hair shaft months after the damage has been done. But not only that I stayed on Phentermine for 3 months and lost nothing but 10 pounds I was walking and exercising and dieting Phentermine has damaged me instead of helping me

  7. I started phentermine 10 months after having my son. I didn’t bother to worry about losing weight while breastfeeding & I was already at my heaviest when I got pregnant with our son. We had lost our 1st baby 2 months prior and I was battling depression at the time. I was 185lbs when I started phentermine, that was 9 months ago. Today I am down to 139.6lbs and still going strong! The extra energy to keep up with my little one is an added bonus that I have been extremely grateful for. The first week on phentermine was a little rough on me because I had a lot of trouble sleeping at night. My doctor had me move my pills up an hour earlier and that helped quite a bit. I also would sweat more than I ever had, but I understood that to be normal. I’ve had great success with phentermine.

    • Hi Aimee, did you experience any side effects while on Phentermine?
      What dosage are you taking?

  8. I lost 25 pounds on my own and took adipex to give me a boost to lose more quickly. I worked out almost every single day though. I lost a total of forty pounds. That was three years ago. I would have kept it off and lost more if I wouldn\’t have stopped jogging. I also got into a new relationship and ate ice cream…..ALL THE TIME! I rarely eat it now because of how rapidly I gained some back. I started out at 223 and I\’m 204 now. Maintaing wasn\’t really hard. I kept it off for two years. I just let myself go when I got happy. Anyways, I just started back this week. Hope I can get down to my goal with is 160. I carry my weight pretty well. I see people that weigh less than me and I\’m like….how?! I\’m big boned and toned legs I guess is why. Anyways, I loved it. It gets you where you want to be mentally because of the boost. I get discouraged if I don\’t lose a certain amount in a certain time and give up.

  9. I was put on Phentramine by my doctor and it was awesome at first….lost like 30 pounds in 3 1/2 months. I made necessary changes with diet and exercise and the pill just stopped working. It started to make me so sleepy and the booat was definitely gone. My appetite went through the roof, cravings, cravings and more intense cravings. Ive gained like all the weight back. So bummed now. Suggestions????

  10. Try eating different foods. A lot with fiber that help you stay full longer and foods high in protein and iron. Although Phentermine is a appetite control pill you still have to eat tight with it. If you choose to exercise that’s even better but you don’t have to. Just eat right. No caffeine or alcohol at all. Start with a strict diet and as your body get use to it you will find yourself able to eat other things you like. You might not always feel full but you wont be hungry either.

  11. I was working out about 5 days a week consistently for a year and actually ended up gaining additional weight ( and no not muscle weight) so out of frustration I asked my doctor what to do. He talked to me about phentermine and so far it is working great I am noticing a difference in losing 3 pounds in only the first week. I noticed that my appetite is very very subdued. I always watched my food intake never eating junk food but always trying to eat 3 meals a day. Now I eat tiny portions. Like one egg for breakfast with a slice of toast, a mandarin for lunch, a wedge of cheese around 5 and then around 7 I would eat a meal with my family that may be a more moderate meal but still less than I used to eat. My fear is that this will not be realistic once I am off the phentermine. I have been working out for over 9 months so that won\’t be an fear is more of gaining due to an increase in appetite from tiny to normal. Is it possible to sustain my weight loss without phentermine once I reach my goals?

    • Hi Marisol, thanks for your comment! It’s definitely possible. No two people’s bodies are the same so nobody can tell you for certain how your body will react, but taking advantage of your time on phentermine to develop long-term healthy habits will absolutely help. It sounds like you’re already doing great with exercise! You may be interested in our article on healthy habits for some other ideas. Additionally, as your body becomes more used to phentermine the appetite suppression effect may weaken, which could also help you adjust more gradually to the return of appetite. Best wishes!

  12. I wonder if there is anything else after phentermine that you can take that is similar to give you that burst of energy?

    • Hi Monica! Some phentermine users find Phen Caps useful to help them curb their appetite and boost their energy after they finish their phentermine prescription. Best wishes in your continued weight loss journey!

  13. I just started phentermine today half 37.5mg pill. I feel
    Fine no side effects. I started gaining weight after a uterine fibroids embolization procedure. From 131 to 160 over 1 year. The procedure messed up my hormones. but what I have notice is that while it is suppressing my appetite a lot of my issue is stress eating. When I get upset I want to comfort myself with food. That and a slower metabolism is a recipe for weight gain. The phentermine has made me realize this because I got upset and went to reach for something to eat but I\’m not hungry. So that\’s good! Also I feel normal on phentermine, like I did in my 20\’s, no aches and pains and a normal energy level, to workout and not be exhausted. I have never had an issue with losing weight until after my procedure and it is depressing. I am trying to find out what will help me keep it off. I can control the streets eating now that I know that\’s one of my problems but I am needing this energy to keep up working out after phentermine so I may need phen caps afterwards. I am also going to get a tummy tuck and Brazilian butt lift this December so I have to lose 15 pounds.

    • Hey ? I wish u much success. I\’m starting tomorrow.

  14. Has anyone used phencaps successfully to keep off weight loss after phentermine. If so, please share the website info.

    • I\’m using it right now and so far so good. My doc said enough phentermine and i did reach my goal weight but was afraid to get it back. I think the trick is to discipline yourself andn change lifestyle for good. Phen Caps just helping me make sure i dont falter lol

      theyre site is, make sure you use promos for discounts too

  15. What\’s the difference between phen caps and ACE? Which is better for long term use. Also, how many months is it consider ok to take phentermine?

    • Hi CP! We’re not sure about ACE (there seem to be a few different options when we Google it), but Phen Caps are an all-natural dietary supplement that helps suppress appetite and boost energy. Phen Caps don’t contain any phentermine HCL (the active ingredient in prescription phentermine), but instead achieve these effects using a combination of nine all-natural ingredients. Given that they are all-natural, there is no stated limit on how long you can take Phen Caps.

      The general recommendation is no more than 3 months (12 weeks) for phentermine. Since this medication was only approved by the FDA as a “short term” treatment for obesity, its clinical trials support a shortened prescription period of 3 months. However, some people can take multiple rounds of phentermine, which means that they take it for 3 months, then take at least 1-2 months off, and then take another 3 months of the medication. Only your prescribing doctor can decide if this is an advisable and safe idea for you.


  16. Hi! I been taking phen.37.5 for 4moths I loss 30 pounds I but I still need to lose 22 pound I was wonder if I can take ISO TONE (from GNC) while I’m taking phen.37.5 and levothyroxine 100

    • Hi Sariah! Always check with your doctor and pharmacist before combining any medication or supplement with phentermine – whether prescription, OTC or natural.

  17. I put a ton of weight on after phetemine.

    I lost 2 lbs on it and am now 10 heavier then when I started. I kept my calories the same just reduced the amount of cardio I am doing.

    I hate my body so much more then before taking this and regret ever taking it.

    So upset

    • Same. 😩 Not sure what to do now. Any ideas? This is so embarrassing after all the compliments from friends about how great I looked.

      • Hi Megan – I’m so sorry to hear that 🙁 You may be interested in this article about life after phentermine, which has some tips about preventing weight gain after phentermine (similar to the above article). If these maintenance strategies aren’t working, is it possible to schedule an appointment with your doctor to talk about other weight loss options? He/she may be able to work with you to find another weight loss medication, a dietitian, or something else.

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