lose weight fast with phentermine

How To: Lose Weight Fast With Phentermine

As the leading prescription diet pill in the US, phentermine is the key to rapid weight loss. But, in order to get the most out of your prescription, it’s crucial to know what you need to do to lose weight fast with phentermine. Here we have a four point guide for you to help you achieve the weight loss results you really want with phentermine! If you’re in a hurry, you can also find our guide summarized in the infographic below.

1. Drink Water

One sure-fire way to lose weight fast with phentermine is to drink lots of water. Drinking water helps weight loss by ensuring that your body is working at its peak, as water is needed for all bodily functions, including boosting your metabolism and helping you to burn fat.  In addition, it can sometimes be difficult for our brains to know if we are hungry or just thirsty, so it’s often a good idea to have some water and check that you’re not a little dehydrated rather than hungry, especially in hot weather. Drinking water fills you up, so your appetite is satisfied without the calories. You should drink water continuously throughout the day, but one great tip is to have a glass around 20 minutes before a meal so that your stomach has a chance to recognize the feeling of fullness, and you should then see yourself eating less at mealtimes.

Drinking lots of water also helps you to lose water weight; often in the first week of taking phentermine, users see rapid weight loss as a direct result of drinking water. If your diet is high in sodium or you don’t drink enough water, your body holds onto the water that it has to hydrate the body, meaning higher numbers on the scale. Once your body gets used to having a constant supply of water, it realizes it no longer has to conserve water and let’s go of the water it was holding onto. So, your body will thank you for drinking lots of water and so will your scale!

Water also helps to relieve dry mouth, the most common phentermine side effect. However, water isn’t enough to really solve the problem of dry mouth, which is a lack of saliva. For this reason, we recommend that you add Phen Drink to your daily routine. Phen Drink is easily mixed with water to boost saliva production and cure dry mouth, plus it’s calorie-free, carb-free and sugar-free, and it even includes metabolism-boosting ingredients such as green tea polyphenols, guarana, and ginger – meaning that it cures your dry mouth and helps you to lose weight fast with phentermine.

2. Eat The Right Foods

Although phentermine works by suppressing appetite, it’s crucial to remember that you need to eat to lose weight. The exact amount depends on your start weight, age, height and sex, but you should never eat less than 1,200 calories per day – your doctor can advise you on your target daily calorie allowance for a more personalized figure. Any less than 1,200 calories per day and your metabolism will slow down, meaning that your body will begin to hold onto fat as fuel rather than burning it. To lose weight fast, you need to keep your metabolism running smoothly with healthy meals and healthy snacks throughout the day. These meals and snacks should incorporate healthy filling foods with plenty of fiber, protein, healthy fats, fruit and vegetables, which will all keep your body working to burn fat, build muscle, reduce inflammation, and lose weight fast with phentermine. For a full guide of the foods you should be eating to lose more weight with phentermine, click here.

lose weight fast with phentermine

Many of these healthy foods also have the added bonus of maximizing the effects of phentermine by helping the active ingredients to last longer in your body, making it all the more possible for you to lose weight fast with phentermine. This is because these foods make your urinary pH more alkaline, which causes phentermine to be excreted at a slower rate, therefore helping you benefit from the effects of added energy and appetite suppression for longer throughout the day. In contrast, foods high in preservatives, saturated fat, salt, and sugar, such as ready meals, diet soda, alcohol, butter and ice cream, cause your body to expel phentermine quicker as they make your urinary pH more acidic, so avoid these foods to lose weight fast with phentermine!

However, if phentermine isn’t suppressing your appetite as much as you’d hoped, then these tips on how to suppress your appetite will offer you some great ways to beat your hunger. You can also boost the appetite-suppressing effects of phentermine by combining your prescription with the weight loss supplement Phen Caps. Phen Caps contain different active ingredients which support the effects of phentermine through different mechanisms within the body, helping you to stick to your plan and lose weight fast with phentermine.

3. Combine Cardio And Weight-Bearing Exercise

Although eating healthily and taking phentermine will make the pounds come off, it is the winning combination of phentermine, diet, and exercise that can really help you to lose weight fast with phentermine, and target weight loss in problem areas too. And, while we would encourage you to find an exercise that you love, incorporating both cardio and weight-bearing exercises into your regime is the key to rapid weight loss with phentermine. Cardio such as cycling, running, aerobics or dancing helps you to burn fat and gets your heart rate up to boost metabolism, and weight-bearing exercises such as these toning exercises and lifting weights will help to tone your body and build lean muscle. This lean muscle will contribute to calorie burn and help to boost your metabolism even when you’re resting, helping you to lose weight fast with phentermine. And, the best bit is, you only need to do weight-bearing exercises for around 10-15 minutes three times a week to build muscle and really see a difference!

4. Establish A Healthy Lifestyle

All too often, a healthy lifestyle is the missing link between good results and really great results with phentermine. To lose weight fast with phentermine, you also have to put your health first, which means getting enough sleep, remembering to relax and de-stress, and taking steps to reduce side effects – side effects which might otherwise make it hard to concentrate on healthy eating and exercise, or might be enough to want to make you give up phentermine altogether.

Sleep is a great weight loss aid and it also helps to reduce stress and the effects that stress can have on your waistline. Since insomnia is a common side effect of phentermine, you might feel the need to combine phentermine with other medications, such as sleeping tablets, but some of these can reduce the effectiveness of phentermine by increasing the acidity of your urinary pH. Instead, you should add a supplement with the serotonin pre-cursor 5-HTP, such as the multivitamin Phen Vites. 5-HTP helps to regulate sleep, and has also been found to increase the effectiveness of phentermine in clinical trials, so it will help you to lose weight fast with phentermine by both improving your sleeping patterns and by adding to the effectiveness of your prescription. The benefits of 5-HTP don’t stop there either, it also boosts your mood, reducing other phentermine side effects such as anxiety and depression, and it helps to suppress appetite naturally, so you’ll continue to feel less hungry even when the effects of phentermine begin to reduce.

Supporting your healthy eating with a multivitamin such as Phen Vites also helps to provide all the essential nutrients your body needs to function at its peak and help you lose weight fast with phentermine, including magnesium, B12, chromium, vitamins A, C, and E, and biotin – many of which are lacking in our modern diets. So, by getting your vitamins, taking steps to de-stress and ensuring you get plenty of sleep, you can help restore the balance, which will in turn help to shift those pounds even faster!


So, here you have it, the four steps to help you lose weight fast with phentermine! How much weight have you lost with phentermine? Let us know by commenting below.


Click the stars to rate this post

[Total: 2447    Average: 4/5]

103 Responses

  1. How much is this pill,that helps u loose weight.

    • Hey Tammy, which pill are you talking about? Phentermine, or Phen Caps?
      Sally, phentermine.com

      • How can I get some pills?

        • Hi Melissa,
          If you would like to get phentermine then you will need to see a doctor, as it is a prescription-only medication. Thi article explains more about the process of how to get a prescription: https://www.phentermine.com/blog/how-can-i-get-phentermine/. If you’re unable to get a prescription, however, then we recommend the phentermine alternative Phen Caps, which you can find out more about here: https://www.phen.com/
          Hope that helps!
          Sally, phentermine.com

    • Lost nothing been in 37.5 four minths

      • Hi Josie! We’re sorry to hear that phentermine isn’t working for you 🙁 Have you followed-up with your prescribing doctor? The most common recommendation is to stop taking phentermine if you have not seen any weight loss in this period of time. However, you should NEVER adjust your dosage/medications without first speaking to a physician. We would, therefore, recommend checking-in with your prescribing doctor about the lack of weight loss and asking what he/she suggests going forward. Best wishes!
        Rachel, phentermine.com

  2. Wow this is very good. What i do is lose weight fast too with my own methods but everyone know what works best.

  3. Tammy, this is a prescription pill, the ones you purchase online are not the same. I am currently taking this and have lost 23#. Each pharmacy will vary on price but I pay less then 20/month.

  4. My wife and I are trying to lose weight naturally; no grains, no sugar, and no processed food. Sometimes it is hard thou. We also exercise cardio and weight resistance. You write there a few sides effects of the prescription pill such as insomnia, anxiety and depression, Are there any others? Thanks.

  5. I have lost 105 pounds with phentermine since October 17th, 2014. I absolutely love what it’s done for me and I can’t wait to reach my goal of losing another 60 lbs!

    • Megan where did you purchase it and how many did you take a day?

      • Did you get them online? If you got them prescribed did you have to go to a weight loss clinic or or primary care? Thanks so much:)

        • You go to your primary care doctor and tell them you want help losing weight and you have heard phentermine or adipex works and you want to try it. They will give you a blood test to make sure you are healthy and it\’s like $30.00 for a months supply. I have to take drug test now when I pick my prescription up.

    • Can You Please share a few tips on u did to help you achieve your current weight loss number?!?

    • How long did it take to notice weight loss?

    • Can you share what you eat? I just started and the eating is the hard part.

  6. With phentermine I have lost so far 43 pounds from May 2015. My goal is to lose an additional 60 by December.

    • That’s Awesome! I Just Started Taking It Today. Im Excited!

  7. I have gone from 152 down to 136 in just 6 weeks with Phentermine. And that is with no lifestyle or diet changes…except much smaller portions because it does curb my appetite quite a bit. I drink a LOT of water. The dry mouth is a bit annoying, but it’s nothing compared to the results I get! It does make my heart race a little but the doctor checks my blood pressure regularly while on it and so far, no issues. I have about 10 more pounds to lose to be at my “healthy weight” according to the doctor. (I am short so 152 is just way too much for my small bones to carry) I will only be allowed to take it until I am down to the target weight. Once I reach that goal, the doctor will no longer prescribe it for me. I am learning how to avoid cravings and how to eat smaller portions and that will carry on long after I reach my goal!

    • Hi Jennifer, i have the similar body type as you and same weight. I started taking half dose pills for 4 days now and it has curbed my appetite just a little. By when did you start seeing the weight come off? My doctor says i can start taking the entire 30mg pill on the 7th day. I am hoping by then i have gone down at least 2 lbs. I live a pretty healthy lifestyle (exercise 5 days/week and eat home cooked meals of protein, veggies and carbs) but my snacking is what has me in the cycle. I am currently 153lbs.

  8. Hii….
    Its Great – Amazing post

  9. It’s amazing I do the gym and taking phentermine for 2 months and I lost 15lbs… Do so every other day hard cardio on the treadmill for 60 mins… Burning up to 900 cals… Than so light abs and legs toning… The next day it’s upper cardio with weights and I push harder each time…. And do a brisk walk for 30 mins after I am done… Drink lots Water water water!!! It does help a lot… And I love each and everyday I go cause I know i am that closer to my goals… And you have to have a mind set that staying Healthier for the long term… You have to stay loyal to you and respect yourself to build confidence.. By doing that is doing what your afraid of good luck to those who are still trying.. Never give up cause you will be successful =)

    • Well done Chrystina! Sounds like you’re doing great, keep up the good work!!
      Sally, phentermine.com

      • Wow chrystina that’s awesome – I luv how u put it about your workout plan I truly agree with you that is what I am doing as well every other day gym and yes water water water your best friend I also and taking phentermine and since Dec 04 2015 till now I have lost 21 pounds doing like u too plus working out really allows your body to work harder to drop those unwanted pounds thanks for sharing

    • Wow!! 60 minutes of cardio is impressive. I\’ve been on the pills for two days now and I plan to start working out at least three/four days a week for two hours. I am hoping to lose about 25-40 pounds. I’ll add water to my routine as well as it seems that\’s a great tip. Thanks for sharing!

  10. I’ve been taking Phentermine since 12/31/15. This is my second time. The first was in 2009 and I lost 60lbs. This time though, I am so tired I can’t do anything but yawn all day. Generally I have a protein shake for breakfast, a protein bar for lunch and a protein and veggie dinner. I’ve lost 8lbs. I feel like a loser and am ready to give up.

  11. really pleased with the article. thanks!

  12. very good tips

  13. Yeah!!!

  14. Nice fast weight loss diet tips.

  15. Informative article, thanks for sharing!

  16. Hi I’m christal, I just started taking Phentermine 4 days ago. My starting weight was 192 which was taken Monday and yesterday I weighed myself and I weighed 186 so I’ve lost 6lbs in 4 days. I like the results I’m getting but I’m not liking the way they are making me feel – I keep feeling nauseous and dizzy and even a little depressed so I’ll probably stop taking them.

    • Hi Christal,
      The first few days on phentermine are often the most severe, but these do start to wear off. It might be a good idea to take a half dosage for the next few days and see how you feel, then build up to a full dosage. Often people find that this helps them avoid the worst of the side effects.
      Sally, phentermine.com

  17. Hello my doctor started me on phentermine 37.5 ml – will caffeine pills interfere with the effects of the phentermine?

    • Hi Brendetta,
      It’s always important to consult your doctor before combining medications and supplements, especially those that may interact. Small amounts of caffeine can be okay while taking phentermine, but be careful because too much can increase side effects and prove dangerous. Therefore, caffeine pills are generally discouraged. Nonetheless, please speak with your doctor before taking any additional pills, supplements, or medications with your phentermine.
      Sally, phentermine.com

      • Seriously???? Phentermine is a schedule 3 drug it\’s basically an upper like speed, would you advise an addict to go ahead and take a little crack with their meth but not too much! No don\’t take another stimulate with your stimulate!!!!

        You should drink little caffeined beverages, lots of water, it tends to give most people dry mouth so use dry mouth mouth rinse also it causes insomnia constipation rapid heart rate and high blood pressure, after three months you should be taken off the medication to give your body time to adjust then see if it needs to be adjusted. Phentermine is also highly addictive so if you take it longer than 6 months make sure you give your body adjustments by not taking it for a month or two, also continuous over use can cause your body to get used to the medication and it will stop working.

  18. How many minutes of cardio, is recommended to help burn fat faster. I take phen 37.5 and met 500mg bid. And drinking 1.5 liters of water a day.

    • Hi Jeannette,
      It depends on your fitness level but around 30 minutes to an hour each day is a good amount. Cardio can range from slower activities such as walking to more fast-paced activities such as boxing, running and aerobics classes. It’s easy enough to complete around half an hour a day just by being more active within your daily life but the best results will come from combining different exercises. If you really want to step up the fat burning then HIIT (high intensity interval training) is often said to be the best method for doing this. Here is some general information about HIIT for you: http://dailyburn.com/life/fitness/high-intensity-hiit-workout/
      Hope that helps!
      Sally, phentermine.com

  19. very interesting article here. i really enjoyed reading this!

  20. Does anyone know what is the dosage for the Vitamin B12 to take with phentermine weekly??

  21. Where do I get this amazing pill everyone is talking about

    • Hi Mari,
      You need to ask your doctor to see if you are eligible for a prescription. Here is a link to explain more about how to get phentermine: https://www.phentermine.com/blog/how-can-i-get-phentermine/
      Sally, phentermine.com

    • Is taking the B12 vitamin over the counter the same has taking the shot ,to help lose weight faster with the phentermine 37.5 perscription

  22. I took the pill from Dec 2015 – March 2016 and now again from Jun – Now…In Dec I weighed 299 lbs and now I am down to 223. My main diet changes were smaller portion sizes (palm size portions), eating vegetables, and eating a fruit for snack. If I want seconds at a meal, I get more vegetables and occasionally a piece of lean meat. I stress I would never ever ever eat vegetables before, now they are the biggest part of my meals. I still might eat some type of dessert once a week if that. Not a big sweet eater. I have a protein shake for breakfast about 3 times per week (protein powder, fresh/frozen fruit, 1% milk, ice or water). It was difficult at first as my body adjust to eating less, but the human body is most efficient machine ever and adapted. Minor weight training for about 20 – 25 minutes 2 to 3 times a week. I used to be a football player and packed on the weight after I stopped playing. I am now the smallest I have been as an adult. My goal weight is 210, so only 13 lbs to go! Anyone interested in this pill, its an excellent supplement to healthy lifestyle changes.

    • Hi Devon,
      Thanks for your feedback and well done on your weight loss! Feel free to leave a review in our phentermine review section here: https://www.phentermine.com/reviews.htm
      Sally, phentermine.com

    • Devon,

      Thanks for sharing. I so need to read this. Praying I can do half as good as you. I am starting this week.


  23. I just received phen 15mg yesterday and was wondering why some people’s are 37mg? TIA

    • Hi Alicia,
      We explained the issue of dosages in this article: https://www.phentermine.com/blog/phentermine-dosage-guide/

      The main reason many people start on 37.5mg, the highest dosage, is because doctors often prefer to prescribe the tablets instead of capsules, and the tablets only come in the maximum dosage. Doctors prefer these because they are cheaper and can be split in half if the max dosage is too strong, or the patient can take the two halves at different times of the day. In addition, the most popular phentermine brand, Adipex, is only available in the maximum dosage.

      Sally, phentermine.com

  24. Hi I have been on phentermine for a month and like a week at first I dropped 11 in my first week then after that I still lost weight my starting weight was 217 I am now 202 but I have been at a plateau for a couple weeks my doctor said to add b12 then the nurse told me to just add exercise eat more and drink a lot more water…my question is I wanna lose twenty to 30 more pounds by Christmas what should I do?

  25. I just started the 37.5 today. I was extremely tired all day and laid down a couple of times but couldn’t fall asleep. Now it’s late and I should be sleeping but I’m wide awake and have a headache too. I’m 192lbs, hoping to get down to 150.

    • Hi Becky,
      I also started on Dec 15th but 30 mg.
      I am also having trouble falling asleep but other than that I am fine.
      Did you lose any weight in these last 4 days?

    • What time did you take the pill?

  26. I started the 37.5 on 12/10/16 weighing 160 pounds. I started taking them 12/12/16 starting with a half a pill – the first day I had so much energy I walked two miles and wasn’t hungry at all. Tuesday I took the other half and felt the same. I started feeling the dry mouth it’s so annoying I do drink a lot of water but the dry mouth is all day and hard for me to fall asleep because I’m so thirsty. I’ve lost 5 pounds already I’m not hungry at all and when I do eat everything has a funny taste to where I’ll eat two bites of it. Yesterday I took a half of a pill because I had to work all day and didn’t want my mouth to be as dry (it still was). It didn’t give me the energy like it has been and made me super moody and felt pissed off all day. When is the best time to take the 37.5 pill?

    • Hi Brooke,
      The best time to take phentermine is first thing in the morning. This is usually the best way to start taking it as insomnia is a common side effect, so taking it early is a way to minimize this side effect. As in your case, it can be advisable to start with half a pill per day to assess the effects and to ease you into the way it works, and then if insomnia isn’t a problem some people like to take the second half before lunch to ensure they don’t get hungry at night, or you can take the full pill in the morning once the side effects have started to wear off a little. From what you say it sounds like you’re not eating enough – you need to eat at least 1200 calories per day or your metabolism will start to slow down and the phentermine will begin to have less effect. And in relation to the moodiness and anger you felt yesterday, this is also a fairly common symptom, and could be related to feeling hunger, or ‘hangry’ as it can be referred to, as well as due to a lack of sleep. This article has some advice about how to reduce angry feelings on phentermine which could help you: https://www.phentermine.com/blog/angry-phentermine/
      Sally, phentermine.com

  27. This article was very helpful. I am on my third day. I don’t have an appetite at all. I feel weird eating when I’m not hungry. I also get random drug testing. I notified them immediately after being prescribed. My doc told me it was not an amphetamine. But my supervisor chewed me out and said I would probably test positive. Any advice?
    Thank you

    • Hi Beka,
      What your supervisor said is true to a certain extent – phentermine causes a false positive effect on drug tests, so it will show a positive result for amphetamine, but this is a false or incorrect positive reading as it’s not amphetamine, as your doctor told you. We explain more about this here: https://www.phentermine.com/blog/will-phentermine-show-drug-test/
      Sally, phentermine.com

  28. Hello,

    I started phentramine in September 2016. I am 4’11, 23 years old and I weighed 151lbs when I first was prescribed. It’s been about 4 months now that I have been on phen and I am down to 129lbs. I’m down 22lbs. I dont feel like I have made as much progress as others have on this page. For me to be in a normal range for my height I need to be between 93-123lbs. My ideal weight is 110-115lbs. I have been eating very healthy and have given up sweets although I have messed up a few times. I exercise a minimum of 4x a week for 35-45mins of running on and off while on the treadmill and sometimes do crunches after. My biggest weakness is not drinking enough water. But my frustration is that I haven’t seen much more weight loss even though I have upped my workouts and how often changed my eating habits and eat much less. I feel like the meds have stopped helping me. Do you just get used to it and eventually it stops working? I have a two month supply left so in March is my final round until I see my doctor again and I’m not sure if she will give me anymore now…someone please help! Why am I not losing more weight when I’m doing basically everything right! Cus there are people on here who have done nothing and lost so much more…

    • Hi August,
      It can be very frustrating when it feels that you are doing everything right but still aren’t seeing the results you want. First of all, it’s difficult not to, but we try to advise people against comparing themselves to others. Everyone is different, and while it may seem that someone is losing weight without much effort, factors such as sex, age, and start weight all have a huge bearing on how quickly people can lose weight. This article explains some of the reasons why weight loss can slow down and how to get your losses back up on phentermine: https://www.phentermine.com/blog/why-not-losing-weight-with-phentermine/
      Sally, phentermine.com

    • Just running on the treadmill and doing crunches isn’t enough.. especially since you’re sooo close to your goal weight. You need to add weight training to your regimen asap. If you want to do cardio I would use the elliptical… also weights build muscle which weighs more than fat.. women are scared to use weights because they’re afraid to get bulky.. that will NOT happen. You will get lean and very toned over time. Just running and doing crunches isn’t necessarily a waste because obviously exercise is great for you however you are NOT getting the most out of your workout. I hardly ever use a treadmill for longer than 15 minutes and only to warm up a bit.

  29. I started taking adipex 37.5mg 5 days ago. I have worked out everyday and walked 1 mile with 139ft incline to 2.12 miles. I drink a gallon of water everyday and I consume 1000 calories a day. In 5 days I have lost 11ibs. It\’s going fast and I love it. I stay very busy and make sure I workout.

    • Hello Sandra. That is wonderful. Thank you for sharing your experience with us. You are welcome to join our brand new support group so you can connect with other phentermine users, share your experience and get some valuable advice. https://www.facebook.com/groups/1069871763087734/

      Have a nice day!

      Rebeca, Phentermine.com

  30. I started taking 37.5 mg of Phen on 12/18/16. I am 31 years old and 5’2″ with a starting weight of 204lbs. As of today, 2/18/17 I am 178lbs. I have lost 26lbs in exactly 2 months. This is following a 1000 calorie per day diet with no exercise incorporated yet. I have experienced ups and downs with the pill and considered getting off of it at one point. In the beginning I had horrible dry mouth, insomnia, extreme mood swings, dizziness and was extremely tired all of the time. I also got my period which lasted for 27 days and I normally only get my period a few times a year due to my birth control. In the beginning I don’t think I was eating enough since most of those side effects were quick to dissipate once I started eating more. My goal weight at this point is 150lbs, though someone my height should really be around 120lbs-130lbs. My plan is to stay on Phen for 4 months, so I have 2 more months to hit 150lbs. I have monthly check up appointments with my doctor who gives me a B12 shot each time to help with energy. Both myself and my doctor are very pleased with the results so far and are optimistic that I will be able to reach my goal.

  31. Hello, started taking phentermine 37.5 last Wednesday had problems falling asleep and didn’t like the jitters, headache and dizziness. I cut it down to a half tablet but I can feel the difference with my decrease in appetite. The full dosage obviously worked better. How long should I stay on the 1/2 dosage until I increase it. I have lost 5 pounds in 4 days though.

    • Hi Precious,
      Really it depends on the individual and how you feel – most people find that they get more used to the side effects after taking phentermine for around a week so we would advise that you stay on the half dosage for a few days and then see how you feel taking a full tablet.
      Sally, phentermine.com

  32. I’ve only been taking PHEN for 2 days. Will do the 1/2 pills for at least 4 days.
    Tracking my nutrition w/LOSE IT app, free version.
    I do take a multi-vit, iron, and have 5-htp on shipment.
    Going to incorporate some light exercise.

    Currently weigh 300 & my first goal is 50 lbs.

    Looking forward to using this as a tool to build healthy habits. I only want to be on PHEN as long (short) as I need to

    • I am like you, I don’t want to be on it forever. Today I took my second dose. yesterday I talked a lot.. lol.. but I had no sleep the night before because my son was sick. I like that you are setting small incremental goals. I started in November at 298, and on my own with diet change and a fit bit lost 45 pounds, but hit a plateau. I heard on Dr. Radio on Sirus that phentermine is a good thing to take to get through a plateau and luckily I have a doctor who was impressed with what I did on my own and wanted to see me continue. Good luck! Tracking food is very helpful to me!

  33. I received the PHEN yesterday with my initial B12 shot. My Dr gave me the 15mg and to take them twice a day. My question is should I continue with the B12 shots or not? Can I take B12 from over the counter with the same effect? I’m currently weighing 207 and I am 5’6. My goal is to get down to my healthy weight of 145. I am limited on my working out right now because of an injury. I will be tracking myself on Lose It!

    • Hi STHW,
      B12 shots have the advantage of giving you the full dosage of B12, while taking vitamins in pill form does mean that some is lost in the absorption process. However, vitamin pills tend to work out cheaper than shots so it’s just a case of taking more of them to get the same dosage, so overall it is just a personal preference.
      Sally, phentermine.com

  34. How often should you get the B12 shot when taking Phentermine?
    Will caffeine cause issues with phentermine? I am 5’10 and 249.5 this morning. I started phentermine yesterday. I started in November at 298, and had weight loss surgery over 10 years ago and was almost 400 pounds. I am taking phentermine to hopefully get down to 200, and then see where we can go to from there. The only thing I noticed is that I am extremely chatty, which I talk a lot anyway. I am taking phentermine 30 mg.

    • Hi Jen,
      Your doctor will tell you when you next need the B12 shot, but depending on the strength it is usually between once per month and once a week.
      Sally, phentermine.com

  35. I have been taking it for 3 weeks and have only lost two lbs. I dont eat meat or drink milk so what can i do to speed up weight loss

  36. Hello
    I started March 2 taking the pill and as of today April 21 2017 I\’ve only lost 12 lbs.. Was hoping to lose more than that. I been reading others comments and I see where I\’ve been going wrong.. not drinking enough water and not eating 1200 calories or more.. I really don\’t get hungry. I walk every day for 1 hour and 30 minutes. Plus I do extreme hip hop off YouTube for another hour… So I really need to start drinking more water and eating more to lose more weight… Good luck to everyone..
    SW: 257 Current Weight: 245

  37. Hi all I haven\’t taken this pill yet. Just ordered but I think it helps to follow your diet plan. It\’s better to take proper diet plan from a qualified dietitian. To get better knowledge acc to our body and calorie requirements.

  38. I have taken phentermine as a dietary supplement and it has given me excellent results. The secret is to drink plenty of water, exercise and maintain a balanced diet. Excellent post, it is very complete.

  39. The links when you click on Phen Vites and Phen Drink take you to Phen Caps. Is the link broken or does the Phen Cap cover these two items as well.

    • I actuallyu had this convo with them via chat last week, they said those were phased out. Shame. Althjo Phen Caps supposed to do the same thing anyways. Told them to take out those links! Confusing.

  40. I am about to start the phen diet pills, friday not sure what dose my Doctor is going to give me. I am 254 lbs. Lots of heath problems herniated disk in neck and lumbar an going into my 4th year of having stomach cancer removed with no new growth. But have LG abdominal hernia that needs repaired. I\’m afraid to have any surgery at this wt. My back pain keep me very limited in my mobility. I\’m going to have to start with walking and maybe pool exercise. One question is the diet my Dr. Always pushes a low carb diet does this work with the phen pill?

    • Hi Toni!

      Any kind of diet works with phentermine, or rather, there is no ‘one particular diet’ that works best for those currently on phentermine. Each body is different, so the best judge of what works best for your age, metabolism and any other factors is your prescribing doctor.

      Best regards,


  41. Today makes two weeks I have been taking the 37.5 tab. I lost nothing! The scale dipped down two lbs briefly but came right back. I\’m eating around 1200 calories. It\’s been a struggle to eat as I\’m not hungry but I\’m making good choices. And I\’m drinking 80-100 ounces of water. I\’m active and exercise at least 3 days a week. I\’m so frustrated. What else can I do?

  42. I have had good luck until today! I learned from others that Phen dips off in effectiveness so I take breaks like a week or two in between prescription refills. This time I gained I think 3LBS. Now I also really increased my weight lifting so I\’m not sure how that impacts my weight. I\’m on 15mg. I\’m really upset, I went from 261 to 219 and today 223ish. I workout 5-6 days a week. So do others take breaks to ensure continued effectiveness?

    • If you are lifting weights you are probably gaining muscle! Keep up the good work!

  43. Hi all I started taking phentermine 37.5 about 2 weeks ago and I have only lost 5 pounds and I don\’t have the burst of energy that everyone seems to experience. I am sure taking a sleeping pill at night does not help. But I would have a replacement meal shake for breakfast and dinner and just a small salad for lunch. So I was a little disappointed that I have not been as successful as a lot of people. I am very active at work (I work in a prison) always on the go. Any suggestions would be great. I am 5\’2 200 lbs and 48 years young. I never was a great water drinker but I force myself to drink 64 Oz. Thank you for your help

    • Hi Michelle, thanks for your comment! If your shakes and salad are pretty light, you may be interested in our articles about calorie needs and eating enough. Even though it sounds weird, your body actually needs a certain number of calories per day to help it lose weight. Also, if you haven’t already, we’d recommend checking with your doctor/pharmacist about combining phentermine and your sleeping pill. This is important to help avoid any unwanted side effects (and find out if the combo has anything to do with your lack of energy).
      Rachel, phentermine.com

  44. Just for encourage to anyone who comes on here. Phentermine works, in 21 days I am down 20 pounds. But with that being said, I have been working out about 6 days a week, twice as much as before. But I have the energy to do so. I find myself eating less and eating healthier because I am not as hungry. Good luck to anyone that is trying to lose weight on the pill.

    • Thanks Adam

  45. Good tips on losing weight. Gym and other workout for losing weight is good because it can reduce weight and also make your body healthy.

  46. Today is my second day on phentermine 37.5 mg
    But I\’m already getting worried because I am having no reaction to it. No insomnia, no dry mouth, no excelerated heart beat. Nothing. When do those kick in?? I wanna know it\’s actually working.. thanks!

    • Hi Kaitie, thanks for your comment! Not everyone experiences negative side effects when they start phentermine – you may just be lucky and responding well to the medication. As long as your appetite is suppressed and your weight is trending down, then phentermine is probably working.
      Rachel, phentermine.com

  47. Does phentermine come in dissolvable form? I\’ve read a few articles saying some will disintegrate under the tongue. Is this true? I do not swallow pills well at all and I\’m trying to find alternative ways.

    • Hi Allison! Suprenza provided phentermine in the the form of an orally disintegrating tablet (ODT), but was discontinued last year. Still, we would encourage you to speak with your doctor about options – he or she may know of a new medication or option that could serve as an alternative to pills!
      Rachel, phentermine.com

  48. just starting taking this in 2 days i was wondering if I walk a mile every other day will it help im not a person that exercise a lot I do work in health care on 3rd shift so it is hard for me to exercise much.I do drink 3 plus liter of water a day and was wondering if that is enough or do i need to drink more my current weight is 227 and my goal is 150

    • Hi Tina! Yes, walking will help – incorporating any type of exercise into your weekly routine will help you reach your weight loss goals. Regarding hydration on phentermine, the general guideline is to drink enough water so that your urine stays light yellow (not clear, not dark yellow). Best wishes!
      Rachel, phentermine.com

  49. Hi Guys
    This is my third time on when. The first time I allowed my schedule to really get in the way. Second time I went strong for a month and then dropped off. Now, i back at it. Trial and error. Taking my time this time. 1/2 a pill at 7am daily. 30min workouts. Added protein shakes to my diet. And LOTS of water. Starting weight: 230/height 5\’7. Will keep you guys updated

    • Good luck arduous26!! Looking forward to hearing how it goes this time around 🙂
      Rachel, phentermine.com

  50. I think the bigger you are, the faster it comes off

    • I think so too

  51. Hi I just started Phentermine today. I\’m 6\’6\” and weigh 299. I\’m hoping to get down to 240 by this time next year. 60 pounds in a year is a pretty lofty goal but my health depends on it. So goodbye to beer (I\’m gonna miss you!!) and hello to healthy choices. I\’ll also continue working out at Planet Fitness 3 times a week.

  52. Hi, I am 51, and my Dr. started me on Phen 15mg-2xday on Oct.3, 2017 at 261lbs. My only side effect has been a dry mouth but it helps me drink my gallon of water every day! She increased me to 37.5/day on Nov 4 and at that appointment I had lost 24 pounds (237lbs). She and I looked at my FitBit stats and realized that I am not eating enough calories to keep me in \”the Zone\” so I am increasing those calories and have increased my workouts. In 3 days I have lost 7 additional pounds(230lbs). I work a very sedentary job so every 45 minutes I get up and move at least 300-500 steps. I do either cardio, weight training or HIIT 6 days a week. I eat a High Protein/Low Carb diet and ALL of my carbs are from natural foods. I havent had a soda since 10/3, I don\’t eat any sweets, and no pasta, bread etc! Its tough but because I feel full all of the time it really hasn\’t been a problem. It helps that I have no kids at home and my husband is also following my diet plan and exercise regime. We feel great and I hope that very soon I can come off of all of my meds for HBP, statin for stroke, etc!!

  53. I have been on and off Phentermne for years! They do work and I’m going to go back on them. I weigh 264 lbs and am 59! Very unhappy with all this extra weight! I am on a Cpap machine and on depression medication. I can honestly say that I have tried every diet program out there. I would love to be under 200 lbs! I guess that this time I need to have a stronger mind set that I can and will do this. My goal is to be Cpap free!

  54. Hi every one !!Good luck to all in the journey. To loose weight. I stared on phentermine back in may 2017 weight 286 I was on it for 4 months I lost 38 pounds my weight 248 I been off the phentermine for the last 7 months and keep my last weight 248. I went to the doctor on 4/09/2018 to start phenthermine again and to help me loose this weight what help me the first time was to drink water. Eating vegetables. Fish and breast chicken. Since I’m obese for my size I’m a 5.3 I only did 20 minutes walking and 20 min of low cardio 3 times a week take it slow and y’all will see results. So don’t get discourage be Positive and good luck.

Leave a Comment

Your email address will not be published.