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User Reviews for Phentermine

Also known as: Adipex-P, Lomaira, Atti-Plex P, Pro-Fast HS, Pro-Fast SR, Pro-Fast SA

The following information is NOT intended to endorse drugs or recommend therapy. While these reviews might be helpful, they are not a substitute for the expertise, skill, knowledge and judgement of healthcare practitioners in patient care.

Condition Avg. Ratings Reviews Compare
569 reviews 63 medications
Weight Loss
2,142 reviews 42 medications
Summary of Phentermine reviews 8.7 2,711 reviews

Reviews for Phentermine

Penelope · Taken for 1 to 6 months August 18, 2019

For Obesity: "I started taking Adipex(P) -(Phentermine) about 6-7 weeks ago. The first 3-4 weeks I dropped the majority of my weight, 15lbs. I took a week off (left it at home whilst on vacation) and gained back 5 lbs over the week because I was not following my diet AT ALL. Even though I gained some weight back, I was eating noticeably less, which was the whole reason I started taking it. I am now back on track and back on the Adipex and I’ve lost 7lbs. I am 26, 5’0” and starting weight was 202.5lbs, wearing an 18 pants. The side effects for me were ULTRA increase in energy, extreme dry mouth, and slightly higher heart rate for the first few days taking it. After about 4 days, the side effects were virtually gone. I will say that if you’re only taking Phentermine to drop weight fast, and not to train yourself for a major lifestyle change, you’re going to gain it all back. This is a tool, and as long as it’s used as such, it will work wonders."

Pvo August 18, 2019

Adipex-P (phentermine) for Obesity: "Just finished the 3 month mark on adipex. 5’, 44 years old, started at 192, lost 17 pounds total. Doc told me I could lose up to 15 a month. Not realistic for anyone over 40. I also worked out regularly, 3-4x/week for 30-45 minutes. Cut out sugar and carbs, but gave myself a cheat day once in a while. You have to drink tons of water. Am satisfied with the results, if I can sustain losing 3-5 a month without it, I’ll be thrilled. Time will tell. Doc than prescribed Belviq which was ridiculously expensive and not covered under my insurance, for $400 a month I would rather work with a personal trainer once a week. I would recommend Adipex, give it a try."

Anonymous · Taken for 1 to 6 months August 17, 2019

For Obesity: "I started taking phentermine in the beginning of March 2019 I was 242 lbs the heaviest I had ever been my entire life! I fell into depression and struggled with weight after I had my children. So in 03/2019 my dr prescribed me phentermine and I have since dropped so much weight I was 242lb and I am now 175lb!!! My goal is to be 135/140 I don't want to get addicted so I don't take it every day. I take it every other day or so I have also changed my diet completely and no longer eat anything unhealthy and keep it low carb. All around this really saved my life and I feel great again!"

Winning August 16, 2019

For Weight Loss: "Today it is Friday August 16,2019 and I started taking Phentermine July 2,2019 I was weight 177.8. My first weight in was August 1,2019 I lost 8.6 pounds. It's really suppressed my appetite, I have to make myself eat. Only side effects was/is a little dry mouth will keep you updated on my progress."

Felixmum · Taken for less than 1 month August 16, 2019

For Weight Loss: "On my first day on phentermine. Fingers crossed. I'm 5'1" and 13.5 stone so hoping to lose a good 2 stone in next couple months"

ChocolateByNature · Taken for 1 to 6 months August 15, 2019

For Obesity: "Six weeks as of today on Phentermine 37.5. I have lost 20lbs with 15lbs more to go. I can honestly say I have not had any side effects however I do have 2 more weeks of pills left. Hoping for the best."

Flawless50 · Taken for less than 1 month August 15, 2019

For Weight Loss: "I’ve been taking adipex for 3 weeks but have not lost any weight. I’m 5’7” and I weigh 190 lbs. I’m only taking 1/2 pill because I’m afraid to get the jitters. My dr also gave me Wellbutrin to help with jitters. Most days I don’t have a lot of energy. I workout 3-4 days per week, this includes strength training and cardio. I’ve taken adipex in the past and the most weight I’ve ever lost was 10 lbs. which took 2 months to lose. I’m thinking about start taking a whole pill. "

unaaah · Taken for 1 to 6 months August 15, 2019

For Weight Loss: "I am 5"1 female, started phentermine (37.5mg) 5 weeks ago and I have gone from 157lbs to 140lbs. Nothing more to say other than if you feel like its not working you need to listen to your body and determine whether you are really hungry or not. if you binge ate before you may still struggle with this, as I still had to learn how to determine hunger from boredom and emotional eating but this pill definitely cleared my mind in determining this. This pill has literally saved me from daily depressing binges, I do not regret anything. Also rarely any side effects other than occasional dry mouth when I'm working."

Mimi August 14, 2019

For Obesity: "I have used Phentermine to loss weight in the past (2010) and had great success, but I did not keep up the healthy lifestyle. I've gained almost all the weight back and saw my doctor for help. I took a half dose on July 22 and started the full dose within one week. The side effects are so bad that I stopped taking the meds yesterday. The insomnia was unbelievable! Sleeping barely 2 hours each night and completely exhausted the next day. I thought I was literally drying up on the inside. My mouth, eyes, nasal passages, "feminine" area ...ALL BONE DRY no matter how much water I drank. I couldn't eat at all and that caused my body to go "in distress" and produced painful "bumps" on my tongue and ulcers in my mouth! I developed anxiety causing me to "chew" on the mouth ulcers making them bleed not realizing until I tasted blood. I took melatonin last night to help me sleep. I'm hoping I will get back to normal soon. I really hoped it would have worked for me this time, but I'm going to have to do something else."

Kat · Taken for 1 to 6 months August 14, 2019

For Weight Loss: "I started phentermine to help me loss some weight on July 8th It’s now August 14th and I’ve lost 18.5lbs. I’m 5’7 and was 211 pounds and now down to 193lb. The first couple of days are rough because you’re not used to the effects but they level out after a week or so and now I just feel a little off but not so much that it affects my day! I eat usually once a day and just drink a lot of water and take my vitamins. I’m 7 months postpartum and gained 80 while pregnant so my goal weight is back down to 125lbs as I was pre baby! I’m doing 6 months on the phentermine per doctors orders, 3 months taking it, 1 month without and then another 3 months on it to finish off. Fingers crossed! I also have PCOS so weight loss this effectively is hard for me otherwise."

Less pounds August 13, 2019

For Weight Loss: "I started taking the Med in July on the lowest dose per my doctor to see how I would do. I only lost 4 pounds no side effects at all. Now she has increase to 37.5 mg and now I feel like I’m really dropping those pounds. I have to ask myself if I have eaten. I’m not hungry at all. Also I noticed if I take and hour before breakfast it works so much better. I go back for my 2nd weigh in on August 23. Good luck to everyone I know the struggle of weight loss."

Dani V · Taken for less than 1 month August 13, 2019

For Weight Loss: "I started phentermine 8/5- starting weight was 226lb. I started with half of pill the first three days and I had tons of energy and it suppressed my appetite so that I was able to make good food decisions instead of stopping at the drive thru on the way home. On some days I work out twice a day and by that I mean I go to the gym in the early am for fasted cardio and strength training...then at night I go for about a 2 mile walk and in my neighborhood its tons of hills. I weighed myself yesterday at the gym and I was 214.8 so I was pretty excited about that. I incorporated keto with this as well and its worked out great so far. I do have a bit of constipation like someone else had mentioned but I just drank a cup of warm water with some of epsom salt and that cleared it right up. I definitely have dry mouth so I have been drinking tons of water, I have reached my gallon goal everyday. So far so good!!"

Smp August 13, 2019

For Weight Loss: "I started Phentermine 37.5mg on August 12, and just wondering if I've done something wrong. I had lots of energy that I normally don't have but it didn't take my appetite like everyone else said it did for them."

Angel · Taken for less than 1 month August 12, 2019

For Weight Loss: "This is my second day. I am 5,1 and 156 lbs and now I am already down I normally drink a gallon of water if day and exercise. My energy for exercising is still the same. So far no side effects the only thing is I can not eat. I am not tried or groggy and can sleep normally. I make myself eat a couple times of day but can only do a few bites is that normal? Other then that I lost two pounds in two days."

Zprface · Taken for 1 to 6 months August 10, 2019

For Weight Loss: "Taking Phentermine has helped a great deal so far. I am 5'3", and I was my heaviest ever at 206lb. For all my life until the past 10 years or so, I had a healthy weight. Ah aging... I started taking the Phentermine the end of May. I did remember that the doctor said there could be some trouble sleeping, so I was prepared for that, and took an over the counter sleep aid (I was told that was ok). I don't feel jittery or have big boosts of energy( except on days when I exercise first thing in the morning). I'm trying to exercise twice a week. For me, the appetite suppressant helps me be more conscientious about what I eat. And, honestly, the dry mouth makes it easier to drink more water. I've lost just over 25 pounds so far. I think I am starting to have a little more energy, but I think that's more because of the weight loss, and not having as much weight on my joints, etc."

Mamma of 2 August 9, 2019

For Weight Loss: "This is my 2nd time taking this pill the first time I took it everyday for 3 months I lost 32lbs was full of energy and could not sleep, it was great for me as I have kids who are always on the go. I took melatonin to go to bed. Or I would just stay up all night . This time around I started taking these for about 4 days, about the 3rd day I was feeling super down and depressed, had a dry mouth, and my anxiety was through the roof, I couldn’t sit still and always biting the inside of my bottom lip. I have stopped taking this pill and will be going to the dr for something different. WARNING If you already have anxiety this pill makes it worse!!!!"

Kael · Taken for 1 to 6 months August 8, 2019

For Weight Loss: "Hi there! I’m on my third month of phentermine. I started at 193lbs and now down to 172lbs! I still made myself eat some protein and veggies throughout the day so I don’t get shakey so I haven’t had any problems with that! However I’ve been experiencing bad lower abdominal cramping and diarrhea or constipation it switches. Wondering if anyone else has had this problem? I drink plenty of water and green/black tea. My doctor said it could be lack of electrolytes so I have to give that a try. But the cramping has been happening for about a month and a half and I haven’t had my period (I’m on birth control and had my last period before I started the medicine) no I’m not pregnant lol. I read that side effects from this medicine can be nausea, abdominal cramping, diarrhea, constipation. Just curious if anyone else has had or is having this problem. Thanks."

Crissy83 · Taken for less than 1 month August 7, 2019

For Weight Loss: "Today is the first day and I do not like it. It did suppress my hunger and I have yet to feel hungry since breakfast 8 hrs ago, but still ate a lite lunch. There is side effects for day 1. I did get a taste in my mouth but it wasn't an unpleasant taste. Two hours after taking the pill I felt a Nyquil kind of high. More like the next day hang over kind of feel. I did experience dizziness and was slightly jittery but not much. Around mid day, about two hours after first rush, I felt another high rush hit following dizziness and slight nausea...very slightly. I took the pill at 8am and it is now 4:53 pm and I still feel the high/dizzy Nyquil hungover effect. After the second rush faded, it left me feeling drowsy."

AJW · Taken for less than 1 month August 6, 2019

For Weight Loss: "Day one. Haven't been hungry and have a fair amount of energy. No side effects so far. I'm taking 37.5mg, 47 years old, in menopause, currently weigh 180lbs. I have high BP (now controlled) and prediabetic . Hoping to loose weight and acquire some discipline when it comes to food. Will post weekly."

SMCmotherof4 · Taken for 1 to 6 months August 4, 2019

For Weight Loss: "I began taking phentermine June 18th 2019 with a starting weight of 295lbs at 5’3”. During the first few days I was very jittery and had trouble sleeping, however after a week I was able to adjust and now the only side affect is dry mouth/thirst. I drink about 100oz or a more a day in water. I cut out all liquids holding calories and cut back on processed food while introducing more whole grains and fresh fruits and veggies. I have PCOS so losing weight can be very difficult. I also started YAZ to help level my hormones while losing the weight. I began increasing my activity levels slowly with avoiding the elevator at work and utilizing the 5 flights of stairs several times a day (took 4 weeks to work up to this) and now I began using my tree climber at home in addition. It’s been 6 weeks and I am down to 266 for a total 29lbs loss. Each week I increase my activity and lesson my processed food. My goal is 150lbs."

CC · Taken for 1 to 6 months August 2, 2019

For Weight Loss: "I started taking Phentermine on 6/28/19. I went in today, 8/2/19, and I have lost 25 lbs! The day I started taking it, I gave up soda and sweets for good. I drink nothing but water. I eat anywhere from 800-1000 calories per day. I haven’t even began to exercise yet but I plan on starting that today by walking 2 miles per day. Phentermine helps suppress my appetite immensely and gives me an energy boost which is great for doing the things I do around my house daily. "

Inherent Chaos · Taken for less than 1 month August 2, 2019

For Obesity: "I am 57 5'2" 216lbs. Started 37.5 Phentermine 5 days ago. I am so tired. I am foggy headed and just sleep. Why?"

Becca21 · Taken for less than 1 month August 1, 2019

Fastin (phentermine) for Weight Loss: "Fastin is really a great appetite suppressant! I have taken it for a few days. Yes it does make you jittery and your heart rate is increased but for me it wasn’t overwhelming. Unfortunately the only reason I couldn’t give it a 10 is because I do feel nauseous throughout the day which makes me not want to eat any food and drink tons of water !"

HL August 1, 2019

For Weight Loss: "I have taken 6 pills so far. I started at 336lb and I'm now at 327lb. I feel good and have not had any of the side effects. I seem to have more motivation and somewhat more energy. I'm definitely not hungry any more which is nice, I now have to remind myself to eat because I'm not hungry and don't realize I haven't eaten yet. I'd say it's worth a shot."

Pam · Taken for 1 to 6 months July 31, 2019

Adipex-P (phentermine) for Weight Loss: "Started the Adipex-P June 4th and it is now July 31st and I’ve lost 35 pounds. I’m now at 180lb. No complaints about this medication but I wouldn’t advise taking caffeine while on it or you won’t be able to sleep for days. Lost 17 pounds the first month. Helps me feel motivated and I’m able to fall asleep just fine. The first week I wasn’t able to get much sleep but my body soon became use to the medication."