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User Reviews for Phentermine to treat Weight Loss

Also known as: Adipex-P, Lomaira, Atti-Plex P

Phentermine has an average rating of 8.7 out of 10 from a total of 1967 ratings for the treatment of Weight Loss. 84% of those users who reviewed Phentermine reported a positive effect, while 5% reported a negative effect.

Phentermine Rating Summary

8.7/10 average rating

1967 ratings from 2268 user reviews.

Compare all 26 medications used in the treatment of Weight Loss.


Reviews for Phentermine

Meme · Taken for 1 to 6 months April 4, 2021

“I started Phentermine on 3/1/21, I weighed 189 lb. I took half of the 37.5mg tablet a day for 2 weeks and then moved up to the full tablet. By the end of the 3rd week in March I was at 179lb. I was happy with that-- but I stalled and here on 4/4/21 I am still 179lb. I like the tablet-- it definitely curbs my hunger and give me great energy until about 8:00pm when it wears off, then I am really tired. I am active during the day and use the exercise 2 to 3 x a week. I working at getting that higher. I'm not sure what to do about the stall. I have a lot of health issues and when I am really down where I can't get up and around I seem to gain back the weight. When I come out of it I go right back to trying to loose it. Sooo 179lb is a weight that my body like to stick at. Any ideas?”

8 / 10
Maxi March 27, 2021

“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 5PM 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.”

9 / 10
Dan210281 March 21, 2021

Fastin (phentermine): “It works well at giving you energy, but it gives the jitters sometimes. It definitely curbs the appetite, but can also make you a little queasy. I lost weight with it, but stopped taking it after about 6 months.”

8 / 10

Frequently asked questions

Jessy September 21, 2020

“Started 15mg phentermine in 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”

10 / 10
t · Taken for less than 1 month August 27, 2020

“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 9am, because any later and I have trouble sleeping. Mentally I feel more focused and have more energy. I exercise daily on my eleptical 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.”

10 / 10
Renee · Taken for less than 1 month June 9, 2020

“I started 15 mg phentermine on June 6 to assist me with weight loss. My weight on June 5th was 201lb, 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 experience any negative side affects, 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 updated in 30 days.”

1 / 10
itsme · Taken for less than 1 month August 20, 2020

Lomaira (phentermine): “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 dr 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 Rx. 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

More FAQ

SheilaD February 11, 2020

Adipex-P (phentermine): “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 catagory. 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.”

10 / 10
Xosasoul · Taken for less than 1 month June 8, 2020

“Hi, I'm 31 year old 5'6 238 lb I started Phentermine on 05/27/2020 and so far I lost 12 lb down to 226lb on 06/08/2020 this is in 13 days I seen stories that people lose more than that in two weeks. All I did is take the pills @7am and I work out for 45 min to an hour.I don't feel Hungary at all but you gotta eat. Phentermine makes you feel like a wonder woman and it is not a "magic pill "you have to exercise and eat healthy. The only side effect I have is 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 it never affect my health. Phentermine seem to help me with my health problem 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.”

10 / 10
Michelle · Taken for 1 to 2 years February 16, 2020

Adipex-P (phentermine): “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 .”

1 / 10
Michelle RR April 12, 2017

Adipex-P (phentermine): “I took Adipex for 1 year and lost 90lbs. I changed my eating habits and starting 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
Chas · Taken for less than 1 month February 2, 2021

“Hello. I've taken (Phentermine-Adipex) in the past and lost 50 pounds in 3 months. However, I did occasionally experienced side affects such as headaches and mood swings in the evenings. But it does effect 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 30days.”

8 / 10
Danii92 · Taken for less than 1 month March 8, 2020

“Started 2/21/20 at 214lbs. I’m 5’2 I’ve been taking it for about two weeks and I’ve already lost 14 down to 200 I’m so happy totally happy goal weight is 160”

10 / 10
Sissy · Taken for less than 1 month January 31, 2021

“I started taking 37.5 mg of phentermine - one pill am. Before taking this I had been exercising and eating right but I could not lose a pound. Since starting phentermine a week ago, I am down 5 lbs. I am so excited! I have so much energy and no appetite. I was close to 200. I also have fibromyalgia and it helps with that. I think they actually should prescribe it for fibromyalgia. I took Cymbalta in past for fibromyalgia but phentermine is so much better! I am going to hug my doctor if I reach my goal of 150. Side effects for me is dry mouth but you end up drinking more because of it so it isn’t a bad thing. I honestly feel like this maybe a miracle pill for me!!”

cwardnm February 3, 2021

“I went to a weight loss clinic Jan 4, 2021. Dr put me on old fashioned low fat diet and phentermine. WOW. Went from 218lb on Jan 4 - to 210lb this morning. The dry mouth is lessening. No more jitters or anxiety. I really don't think about food. Dr told me not to spend too much time in the gym, because I am not training for athletics, and most people get into routines they will not sustain. He told me to walk a bit every day. Told me to continue my yoga every day, even if for 15 minutes. TAKE TRAZODONE for sleeplessness. It's not a sleeping pill, but an anti depressant. Doesn't have the harmful side effects of regular sleeping pills. If I combine it with melatonin, it really helps. Also, I don't take Phentermine every day. I think it accumulates in my system and keeps me awake unless I mix it up a bit. I take a half some days, and today I took none. I will sleep better tonight. AND I still get the benefits of a reduced appetite.”

10 / 10
Bug June 3, 2020

“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.”

8 / 10
Anonymous October 19, 2008

Adipex-P (phentermine): “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 the 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. ”

10 / 10
abs1975 · Taken for less than 1 month May 27, 2020

Lomaira (phentermine): “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.”

10 / 10
Lisha February 17, 2021

“I started taking this medication on 1/11/21 weighed in at 246 pounds, on 1/27/2021 I weighed in at 237 pounds. Today 2/17/2021 I’m 224 pounds. I have no appetite and I work out 5 times a week for 1 hour. My goal is 190 pounds. The first few days I felt weird, after that no symptoms. I can barely eat a medium size chicken drumstick. I know I’m averaging less than 1200 calories per day.”

10 / 10
Nora June 3, 2020

“5”11 and I weigh 170, yes I’m tall but this is the heaviest I’ve been and I’m not happy with it. Side effects: no sleep , lower back aches , dry mouth, made me angry which I’m never angry. Also here and there a little depressed. But I would have to snap out of it very quickly. But overall it’s a good pill to take if you have self control and you won’t get addicted to it. It gives you lotssss of energy which I like to work out in the gym or go for a jog at a park. You will lose weight quickly but you have to maintain it . I have a sweet tooth so I would eat chocolate after I lost all my weight then I would see I gained weight like 2lbs and I would work out the next day. You have to be consistent and dedicated.”

10 / 10
Bamamom31 March 15, 2021

“I took this pill for 3 Months and with dieting and exercise I was able to loose 33lbs. Now 4 Month's later after no longer taking it & still using the same diet and exercise, yet I managed to gain all the weight back ! This also has happened with many coworkers , friends and family members. It seem's to be that once this pill is no longer in your system. Your body can automatically slowly put the weight back on!!”

2 / 10
ANicole February 4, 2020

“I tried to be more active in small ways and started intermittent fasting. I was able to lose 8lbs before being prescribed phentermine. This put my starting weight when I began phentermine 232lbs. I started on 01/11/2020 and as of today 02/04/2020, I weigh 214lbs. That’s 18lbs down. This time around has been completely different. I swear by intermittent fasting, I drink green tea and water only (approximately 96oz), 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 workout 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!”

9 / 10
Lucky one · Taken for 1 to 6 months May 1, 2019

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

Babydoll March 6, 2021

“Omg! Phentermine should be used to help Fibromyalgia pain plus lose weight. When I am taking it, I feel amazing. I have energy, no pain and lose weight. And people say a pill can’t make you lose weight-WRONG! It does. I have hardly any appetite and no stomach growl or pains. I am super impressed! Down 12 Lbs in 2 weeks when I couldn’t lose 1 pound exercising and eating right. I still exercise 3 days a week. I feel like my PA is a miracle worker for letting me get on this pill. They did an EKG before prescribing. You weigh in every month too.”

10 / 10
Anon January 29, 2021

“5'2", Female, 28. Sedentary (desk job, gyms closed). Pre-existing PTSD, depression and ulcerative colitis. 37.5mg phentermine for 3 months. Doc did not stack it with fluoxetine or topamax as I'm already on 450mg of Wellbutrin. After gaining 15lbs in the first few months of COVID isolation, I decided to take this. Yes, I got the jitters for the first few days. Yes, it made me anxious for the first few days. Yes, my breathing pace and heart rate were up for the first few days. It went away. I didn't experience constipation per se, but I ate so little that bowel movements were few and far between. I took it between 6:30am and 8:00am every morning, otherwise I didn't get enough sleep. August 2020: 136lbs, size 28/7 jeans, m/l shirts, 34B bra. November 2020: 112lbs, size 23/3 jeans, xs/s shirts, 32C bra. This was combined with an Atkins variety keto diet, with 2 shakes and 1 big meal/day on most days. I kept my carbs under 20/day and struggled to eat 1200 calories.”

10 / 10
SlimInTheMaking · Taken for less than 1 month September 26, 2014

Adipex-P (phentermine): “I know everyone is looking for a miracle weightloss pill well let me tell you Adipex is not it. Adipex in my opinion is a special."Helper" yes it definetly suppresses your appetite and gives you a boost of energy. But ultimately you have to change your lifestyle to compliment this. I cut out sugary foods, fast foods, fried foods, and carbs. I drink plenty of water, and workout 3 times a a week with cardio. I do 4 and half miles on the treadmill on a 8.0 incline. Tomorrow makes a whole month and I have lost 25lbs total... And I'm going into my second month fighting harder.”

10 / 10
fat to phat July 25, 2009

Adipex-P (phentermine): “I have been taking Phentermine for 6 months. I was 250lbs 5'10" male. One day got tired with shortness of breath just taking a shower, that opened my eyes that I needed help. Now I'm 190lbs just taking this miracle medicine and just walk the dog type of exercise. Breakfast - Cheerios/2% lowfat milk and bagels with cream cheese. Lunch - chicken salad or shrimp salad with low fat dressing. Dinner - before 6pm - KFC grilled chicken 2pc. mash potatoes or rice. SNACK - 8pm any real fruit. AVOID ALL SODA EVEN DIET SODA, FRUIT DRINKS, ICE CREAM ANYTHING SWEET. "WATER ONLY!" It will be tough at first but stick to this for 1 month and you have survived. You WILL lose 10-15lbs. CHECK AND RECORD WEIGHT DAILY SAME TIME BEFORE BREAKFAST. GOOD LUCK.”

10 / 10
Anonymous September 18, 2009

“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! ”

8 / 10

This information is NOT intended to endorse any particular medication. While these reviews might be helpful, they are not a substitute for the expertise, knowledge and judgement of healthcare practitioners.