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Phentermine User Reviews & Ratings

Brand names: Adipex-P, Lomaira, Atti-Plex P

Phentermine has an average rating of 8.7 out of 10 from a total of 2,951 reviews on Drugs.com. 84% of reviewers reported a positive experience, while 5% reported a negative experience.

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Weight Loss (Obesity/Overweight)  
8.7
2951 reviews for Weight Loss (Obesity/Overweight) 61 medications
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Reviews for Phentermine

  • Miche...
  • April 12, 2017

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "I took Adipex for 1 year and lost 90 lbs. I changed my eating habits and started doing light exercise 3 days a week. I've been off Adipex for 3 months and haven't gained any weight back. Just stick with a healthy eating plan and you will not gain. Medications should be used as a tool; if you don't change your eating habits, then you can gain all the weight back. *sidenote...please stop writing reviews when you haven't taken the medication or just started the medication. The purpose of a review is to give your opinion on a product after using it for some time. Announcing that your doctor has prescribed Adipex isn't a review and it isn't helpful for people who are looking for reviews on this website..rant over.."

10 / 10
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  • Jessy
  • September 21, 2020

For Weight Loss (Obesity/Overweight) "Started 15mg phentermine on June 30, 2020. As of today, September 21, I have lost a total of 33 pounds. I am 33, 5’5” starting weight 212. Today, I currently weigh 179."

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  • tano
  • Taken for less than 1 month
  • August 27, 2020

For Weight Loss (Obesity/Overweight) "I'm 5'10 and when I started on 8/3/20, I was at 249 pounds and began on 15mg phentermine. Very self-conscious and all around uncomfortable going anywhere or even taking pictures with my family. Today 8/26/20, I am at 230. I've lost 19 pounds in 23 days. I eat around 20-25 carbs a day and no more than 1300 calories. I do take it early around 9 am because any later and I have trouble sleeping. Mentally, I feel more focused and have more energy. I exercise daily on my elliptical, and I also walk a lot at work. I'm very happy with my progress and hope to get to my ideal weight by the end of the year or early next year."

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Frequently asked questions

  • SheilaD
  • February 11, 2020

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "Started Adipex 11 days ago, weighed myself today and have lost 11 pounds. Started at 181 and am now 170. Going through menopause and have spent the last two years in the gym unable to lose a pound. Once menopause hit, I gained so much that my BMI for the first time put me in an overweight category. I asked my Dr. if there was something I could take that helped the work that I already do actually work. Goal weight is only 155, I'm 5 feet 10 inches tall. The first week she had me take half a pill a day, beginning of second week a full pill. The first day I had a bad headache. I have dry mouth from taking it, but not so bad it's unbearable. I drink a ton of water. It took away my desire to drink coffee and it never gave me the bad coffee withdrawal headaches. I'm eating anywhere from 600-1200 calories. Change your eating habits while on Adipex. Take those few months to get your body adjusted to healthy food choices so that it doesn't crave the bad stuff once you're done taking the pills."

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  • Renee
  • Taken for less than 1 month
  • June 9, 2020

For Weight Loss (Obesity/Overweight) "I started 15 mg phentermine on June 6 to assist me with weight loss. My weight on June 5th was 201 lb, and as of today, June 9th, I'm down to 196.6. I noticed that I have more energy and that I'm more focused than prior to taking the pills. I haven't experienced any negative side effects, so for me, it's been all positive. I have been walking 4-5 miles each day, and my calorie intake is between 1,000 - 1,200. I'll provide an update in 30 days."

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  • itsme
  • Taken for less than 1 month
  • August 20, 2020

Lomaira (phentermine) for Weight Loss (Obesity/Overweight) "I started Lomaira (phentermine) on 8/13/20. I'm 5'10 and my weight was at an all-time high of 218 when I started. My doctor had me start with a half dose (4mg) and half dose of Topiramate (generic Topamax -12.5mg) for two weeks. Then I will move to a full dose of each for the rest of the prescription. I have been drinking a gallon of water a day, eating a low-calorie diet, and doing light exercise daily. My appetite is controlled, my energy is up, and my system is cleansed. I have lost 10 lbs in one week. I do need to take it earlier in the morning because it's hard to fall asleep. But I'm looking forward to feeling like myself again. Best of luck to all of you!"

10 / 10
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  • Miche...
  • Taken for 1 to 2 years
  • February 16, 2020

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "Dooo NOT TAKE THIS MEDICATION!! Yes it works for weight loss but it’s not worth the long term side effects . You will end up addicted to this medication, it is a stimulant that increases your dopamine and then depletes it once you stop which makes you severely depressed when you quit . If you have anxiety or might be bipolar don’t take this medication as it can make you very manic , euphoric , and give you a false sense of invincibility . I’m dealing with the effects 10 years later after taking it . I made stupid choices when I was on this medication I regret it everyday of my life ."

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  • tinyd...
  • Taken for less than 1 month
  • May 30, 2021

For Weight Loss (Obesity/Overweight) "Was just prescribed phentermine 37.5 mg on 5/25. I was nervous about side effects (jitteriness specifically) so the first three days I took half pills. No jitters, just a little more energetic and alert. I upped my dose to the whole tablet, which made me a bit more energetic but still not jittery. I just feel like getting up and being active/productive. But I do have to take it early in the morning or I won't be sleepy at night. It's only 5/30 now. In 5 days I have lost 9 pounds, from 327 lb to 318 lb. I know the drug isn't a long-term solution for better health. But it's a great jump-start and it's helping me break out of the cycle-- gain weight > feel crappy > lose motivation > gain more weight > repeat. I'm working to develop healthy habits for sustained health and continued weight loss when phentermine and I part ways."

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  • Tika
  • March 5, 2019

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "This pill is a magic pill! Only if you take it the right way. I've experimented with it over the past year, the two times I've been prescribed it. It's supposed to be taken 3 months on, then 2 months off. I would take advantage of the 2 months off to appreciate the weight you've lost, and practice discipline and healthy living. What you won't read is, you will gain it back! This pill will give you crazy ENERGY! Use it! The most effective way, I would recommend taking your dose is on an empty stomach. Preferably as soon as you get up. So, if you get up around 6, take your dose. Around 8:30 or 9 eat breakfast. WATER, WATER, WATER! Is your best friend while on this pill, which will have your skin glowing! If you don't drink water or low sugar fluids with this pill, you will have dry mouth, mood swings, and irritability. I will guarantee it. Yes, this is my personal experience."

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  • Hotdog...
  • Taken for 1 to 6 months
  • July 7, 2021

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "I started Adipex on April 11, 2021. My starting weight was 222 lbs! I am a 5'4 female. So far, I’ve lost 42 lbs in almost 3 months! Haven't had any crazy side effects other than a perfume taste when I eat certain things, and my resting heart rate is high every once in a while! So far so good! Definitely glad I asked my doctor."

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  • Anonymous
  • October 19, 2008

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "I have used this pill off and on for the past 9 years. I have to say it's the BEST pill for losing weight and the ONLY thing that has ever worked for me. I gain at least 60-70 pounds with each pregnancy, so each time I have a child, I have a MASSIVE amount of weight to lose, and each time I take the pill, I go right back down to my size 4 within 4-5 months (no exercise). My tips, after taking it so long are the following: ALWAYS take way before breakfast - take it first thing in the morning, and if you really want to get results, don't eat any carbs for breakfast. NEVER go from taking one a day to stopping, because you WILL gain it back. You must wean yourself off SLOWLY and you'll be fine."

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  • Lucky...
  • Taken for 1 to 6 months
  • May 1, 2019

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "Started Adipex on April 1, 2019 and lost 10 pounds. I went back to the Dr. on April 29th and found out I was pregnant after not being able to conceive in 15 years. The doctor told me that Adipex makes you very fertile, so I guess that was a boost to me getting pregnant. But now I’m about to gain those 10 pounds right back, in the best possible way, lol"

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  • SlimI...
  • Taken for less than 1 month
  • September 26, 2014

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "I know everyone is looking for a miracle weight loss pill. Well, let me tell you Adipex is not it. Adipex, in my opinion, is a special 'helper'. Yes, it definitely suppresses your appetite and gives you a boost of energy. But ultimately, you have to change your lifestyle to complement this. I cut out sugary foods, fast foods, fried foods, and carbs. I drink plenty of water and workout 3 times a week with cardio. I do 4 and a half miles on the treadmill with an 8.0 incline. Tomorrow marks a whole month, and I have lost 25 lbs total... And I'm going into my second month fighting harder."

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  • Xosas...
  • Taken for less than 1 month
  • June 8, 2020

For Weight Loss (Obesity/Overweight) "I'm 31 years old, 5'6, 238 lbs. I started Phentermine on 05/27/2020 and so far I lost 12 lbs, down to 226 lbs on 06/08/2020. This is in 13 days. I've seen stories that people lose more than that in two weeks. All I did was take the pills at 7 am and workout for 45 minutes to an hour. I don't feel hungry at all, but you gotta eat. Phentermine makes you feel like a wonder woman and it's not a 'magic pill'; you have to exercise and eat healthy. The only side effect I have is a small migraine and DRY MOUTH. I forgot to mention I also had a tiny thyroid problem, which I don't have anymore, and was taking birth control pills, Slynd, for my hormones to balance, which never made me gain weight at all and never affected my health. Phentermine seems to help me with my health problems a lot. I truly recommend this pill to someone who is willing and dedicated to lose weight. This is a life changer for a better you."

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  • Maxi
  • March 27, 2021

For Weight Loss (Obesity/Overweight) "Paying $200 a month which includes a 30-day supply, a B12 shot, full body analysis, and a visit with a doctor to create a meal + workout plan (weight loss clinic). I’m on my 4th day of the supplement and my appetite is so suppressed that I’m in shock. I didn’t think it would work this strongly. I get slightly hungry around 5 PM but the pill makes you want to eat healthy, so I’ve been eating veggies and fruit. And I’m eating simply for nutrients, not because I’m hungry. I have to force myself to eat. Your appetite will be suppressed to the MAX. This drug is a life-saver (literally) could potentially rescue me from depression, obesity, and future health issues. I highly recommend to anyone like myself who has tried EVERY diet there is known to man. I could never stick to anything for more than a week or so. Nothing ever worked this well for me, and I am FLABBERGASTED. My mindset has already transformed in 4 days, and I’m already seeing the light at the end of the tunnel."

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  • Shellyt
  • May 20, 2019

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "It does work. You have to work with Adipex though. You have to stay hydrated. You have to eat at least 1000 calories if not 1200 daily. You have to exercise a little. Even if it is just walking. You need to also take it very early and take it around the same time each day, like 6 am or 7 am. I would not go past 8 am if you are sensitive to medications. Otherwise, you will be up all night long, ready to run around. You also need to change the foods you eat. We are fat because of what we eat. This is not a magic pill that will melt your fat away. You need to correct yourself for it to really help you on your weight loss journey. This is all common sense. It raises your heart rate up (it's almost like speed). That is what gives you the energy that we are all lacking. For me, Adipex is a fantastic appetite suppressant. Good luck."

8 / 10
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  • Jamai...
  • Taken for less than 1 month
  • September 15, 2014

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "I started Adipex on 8/30/14 and as of 9/15/14 I've gone from 202 to 185 lbs. 17 lbs in a little over 2 weeks. I'm 5'6' and borderline diabetic. My doctor has been on me for the past 5 years to lose weight. She says I'm considered obese and will have to put me on medication for the diabetes soon, but my wake-up call was when my joints started aching and I was losing feeling in my feet. In addition to Adipex, I've eaten 85% clean, opting to snack on baby carrots instead of cheese and crackers. All I drink is water. I've cut out the alcohol, coffee, and all fats and sweets. I walk everywhere and have lots of energy. I take 1 pill between 9:30 & 11 am every day, and I fall asleep by 10:30 pm. My goal is to be around 150 lbs."

9 / 10
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  • Chas
  • Taken for less than 1 month
  • February 2, 2021

For Weight Loss (Obesity/Overweight) "Hello. I've taken Phentermine-Adipex in the past and lost 50 pounds in 3 months. However, I did occasionally experience side effects such as headaches and mood swings in the evenings. But it does affect people differently. I would definitely recommend others to try it. It’s not a magic pill but, incorporated with a healthy diet & exercise, it will help get off stubborn pounds quickly. Fast forward: After 7 years of keeping the weight off, I gained all the weight back due to depression & just being lazy during Covid. I’m back taking Phentermine 37mg. I must say my body is not responding to the medication like before. The strength of phentermine now is weaker than it used to be. I will update in 30 days."

8 / 10
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  • Sam
  • Taken for 1 to 6 months
  • May 18, 2024

For Weight Loss (Obesity/Overweight) "I am a 57-year-old nurse and my weight had increased to 224 pounds after years of menopause and management of chronic illnesses. I started taking phentermine on 12/1/23 as a low dose. I was amazed at the energy it provided me. I also incorporate exercise as it gives me the energy to exercise, a healthy diet with calorie control to 1000-1200 calories per day and daily weights. I also use MyFitnessPal and Fitbit to help log and manage my progress. Now I am almost 6 months into my journey. I have lost 45 pounds, my cholesterol and triglycerides are now normal, my blood pressure is now in low normal and beginning to wean off BP meds. I have psoriatic and rheumatoid arthritis and my pain has gone from 5-6 to 0-1 (on most days). I have experienced dry mouth, headaches, and constipation, but drinking more water, eating more fruits and vegetables, and exercise have helped all of these. Stay the course, the results are well worth it. I love the healthier and thinner me!! This medication is a lifesaver!!"

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  • Retir...
  • Taken for less than 1 month
  • April 7, 2014

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "I was just prescribed Adipex today (FINALLY). Long story short - I was about 30 pounds overweight in 2002 when my husband was deployed to the war. I decided to use that time to LOSE WEIGHT. I got the meds, and in 5 months I had already lost 55 pounds! I was thrilled. I wouldn't send my husband a photo of me because I wanted to surprise him. Boy, was he surprised! He stopped in his tracks and mouthed 'WOW'. Then three years later I got a brain tumor. The cancer medications and the steroids that I had to take to try to control the tumor made me gain it all back PLUS another 45 pounds! (Plus I lost my hair). Well, fast forward about 8 years, I have lost 55 lbs. Doc prescribed Adipex to help get the rest off! Wish me luck!"

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  • fat...
  • July 25, 2009

Adipex-P (phentermine) for Weight Loss (Obesity/Overweight) "I have been taking Phentermine for 6 months. I was 250 lbs, 5'10'' male. One day, I got tired with shortness of breath just taking a shower; that opened my eyes that I needed help. Now I'm 190 lbs just by taking this miracle medicine and doing type of exercise. For breakfast, I have Cheerios with 2% low-fat milk and bagels with cream cheese. For lunch, I have either chicken salad or shrimp salad with low-fat dressing. For dinner, before 6 pm, I have KFC grilled chicken (2 pieces) with mashed potatoes or rice. For a snack at 8 pm, I have any real fruit. I AVOID ALL SODA, EVEN DIET SODA, FRUIT DRINKS, ICE CREAM, OR ANYTHING SWEET. 'WATER ONLY!' It will be tough at first, but stick to this for 1 month and you will have survived. You WILL lose 10-15 lbs. CHECK AND RECORD WEIGHT DAILY AT THE SAME TIME BEFORE BREAKFAST. GOOD LUCK."

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  • Anonymous
  • September 18, 2009

For Weight Loss (Obesity/Overweight) "There are a LOT of people in this forum that are being extremely unrealistic about how this drug is meant to work. This drug is meant to help you learn new eating habits and get you motivated to lose weight and get healthy. Since 6/1/09, I have lost 23 pounds, and that is due not only to the appetite-suppressing effect of Phentermine, but I hit the gym HARD 4/5 times per week (and I have NEVER been an exerciser), and watch everything that I eat. If you are using Phentermine to simply fast yourself thin, you will have a very hard time keeping it off once you stop the medication. Take this opportunity to learn about nutrition and exercise, and make a permanent change for your health and for YOU!"

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  • abs
  • Taken for less than 1 month
  • May 27, 2020

Lomaira (phentermine) for Weight Loss (Obesity/Overweight) "I'm 44 and have gradually put on weight over these past five years - 50 lbs to be exact :( I currently weight 177 and although I've done everything to try and lose my weight, truly, since turning 40 it has been nearly impossible and the weight just keeps coming on. I'll keep you updated on my journey but I am excited to try this as my last resort along with exercise and low calorie foods."

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  • ANicole
  • February 4, 2020

For Weight Loss (Obesity/Overweight) "I tried to be more active in small ways and started intermittent fasting. I was able to lose 8 lbs before being prescribed phentermine. This put my starting weight when I began phentermine at 232 lbs. I started on 01/11/2020 and as of today, 02/04/2020, I weigh 214 lbs. That’s 18 lbs down. This time around has been completely different. I swear by intermittent fasting, I drink green tea and water only (approximately 96 oz), I mainly eat fruit, veggies, trail mixes, and seafood. When I feel hungry between meals, I eat an apple or a serving of trail mix. I also work out 45-50 minutes 5 days a week in addition to walking my dog 1/4 of a mile on my lunch breaks. I can truly say that my weight loss is not just because of the phentermine. I put in a lot of work! That’s the true key to success. Phentermine is not a magic pill, but it’s certainly an aid to help keep you on track. I’m working hard to create healthy, lifelong habits. Good luck everyone!"

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  • Bug
  • June 3, 2020

For Weight Loss (Obesity/Overweight) "I just started taking 37.5 mg of Phentermine yesterday for weight loss. After struggling with diets, exercise and medication weight gain, my doctor and I decided this was the best way to help me shed the 10-20 pounds I’ve been wanting to lose for at least 6 months. First and foremost, take this pill as early as you can because it did affect my sleep. On the first day I only experience light jitteriness, a little chest pain and a headache. My appetite was lessened. Today (the second day) I am already down a pound, I’m not very hungry at all and I only have mild jitters and a headache. Nothing that isn’t tolerable though. I plan on taking this for a total of 3 months only so I’m hoping I’ll drop the excess weight I’ve gained and develop healthier practices while I’m on it. I will say that the increased energy is nice for someone who wasn’t sleeping well and then wasn’t motivated to move around."

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Reviews may be edited to correct grammar/spelling or to remove inappropriate language and content. Reviews that appear to be created by parties with a vested interest are not published. This information is not intended to endorse any particular medication. While these reviews may be helpful, they are not a substitute for the expertise, knowledge, and judgement of healthcare professionals.