Skip to Content

User Reviews for Phentermine

Also known as: Adipex-P, Atti-Plex P, Fastin, Ionamin, Obenix, Obephen, Oby-Cap, Oby-Trim, Panshape M, Phentercot, Phentride, Pro-Fast HS, Pro-Fast SA, Pro-Fast SR, Suprenza, ...show all 19 brand names

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.

Learn more about Phentermine.

Filter by:

User Ratings

10
   
53%(765)
9
   
23%(324)
8
   
12%(163)
7
   
5%(63)
6
   
3%(30)
5
   
3%(31)
4
   
2%(17)
3
   
1%(13)
2
   
1%(9)
1
   
3%(32)

Phentermine Rating Summary

8.8/10 Average Rating

1447 Ratings with 1408 User Reviews

What next?Compare all 45 medications used in the treatment of Weight Loss.

Reviews for Phentermine to treat Weight Loss

Sort by:

"In one week I lost 5 pounds. I continue exercising, but I eat a lot less! This pill totally curbed my appetite, and food that I used to love doesn't seem appealing. I'm already making better food choices, and the pill has forced me to do so. How? Again, because food doesn't look so great. I really pay attention to what real hunger feels like, and my stomach tells me so. So if you are an emotional eater or social eater, this pill will help you avoid that bad habit. The only side effect that I can identify is that my body feels a little strange and tingly. I have been feeling really tired (opposite of the extra energy others are reporting). Positive side is I already feel better about how I look in my clothes."

   
9.0

Mom on the go (taken for less than 1 month) July 17, 2016

11 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"Female, 27 years old, 5'1", starting weight 132 lbs 14 days of taking Phantermine, i'm 5 lbs down, current weight 127 lbs. I was prescribed Phantermine at 15.00 Mg for the first two weeks, I lost 3 lbs - no change in appetite. My doctor raised the dosage to 37.5 mg. I'm now 5 lbs down. With the increased dosage, I feel like I've been sucking on cotton balls all day :( but it has forced me to drink at least 70 fl oz. a day. Downfall, is that since my dosage was increased i'm only sleeping a couple of hours a night. On a positive note, since the dosage was increased my appetite is non existent, I have more energy, I've lost 5lbs in 14 days. Good luck guys and gal"

   
6.0

Unicorn 2016 July 11, 2016

11 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I wrote a review before when I was a couple weeks into taking phentermine. I am 5'4" and I started on May 1st, 2016 weighing in athe 236 pounds. I was postpartum 1 year after my second child. Today is July 10th, 2016 and I weigh 200 pounds and still losing by the day! I've noticed lots of changes I'm going to share with you all. For starters, I did experience the dry mouth side effect for the first month. I also experienced lots of energy which was a huge thing for me. Now that I'm about 2 1/2 months in and the energy really subsided. Also, in my second month there were days I would not take my medicine because I honestly just missed eating. I also noticed I could continue healthy choices w/o the med. I'll check back in!"

   
10

Anonymous July 10, 2016

29 users found this comment helpful. Did you?   Yes   No Report as inappropriate

Adipex-P (phentermine): "I am a 28 y.o female 5 ft 1 in and weighed 167.2. I started changing my eating habits 10 days before taking the pill and lost 8 lbs. I have been on the pill for 2 days and so far, it has curbed all my cravings. It definitely does give you dry mouth. I go to the gym 4 times a week plus do work outside at home every day of the week. I drink a gallon of water plus some everyday for the dry mouth and to keep me hydrated. I am motivated. I don't wake up tired. I have loads of energy. I am trying to get down to 120 to 125. I will update in 2 weeks :) :)"

   
10

Bella1188 (taken for less than 1 month) July 9, 2016

17 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started taking this drug prescribed by my doctor on 6/21/16. I had started a diet the previous week of only fruit and vegetables. I dropped a good 8 pounds from that. I started medication and it has helped my appetite control. I took one full pill every day for a week. I started walking a lot. A good 2-3 miles a day. I also kept with eating fruit in morning and low carb/protein during the rest of the day. I have had to drop down to half a pill because of insomnia and have noticed constipation. I am on weight watchers now and follow the plan. I eat fruit and vegetables like crazy and I know it helps the weight loss. I am down 13 pounds as of 7/8/16. I am sure I will start to lose 1-2 pounds a week soon which is the healthy way."

   
10

cooker333 July 8, 2016

6 users found this comment helpful. Did you?   Yes   No Report as inappropriate

Adipex-P (phentermine): "I re-started Adepex today. Full dose. I had amazing results 2 years ago. Went off it, but gained 40 lbs back. Unlike some user reviews, I can tell you the weight gain was NOT a result of quitting Adipex. It was poor choices in diet and lack of exercise. I got lazy. But NOT because I quit taking Adipex. I started today because I need help. It is a potent drug. And it will make you not want to eat. EAT ANYWAY. When you don't, you WILL experience mood swings and hostility. The purpose of this drug is to HELP you make better food choices and to get into a good exercise routine. Drink LOTS of water and EAT every three hours. Do some research BEFORE taking this drug. It can be EXTREMELY beneficial if you use it the right way. Good luck all."

   
10

48carfan July 8, 2016

26 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"Female 37 yrs w Starting wt 263/ending wt 230. Was on phentermine 37.5 for 3 months. Lost 15lbs first month, 10 second, and 8 the last month. Only dealt w jitteriness, insomnia, dry mouth for the first 2 weeks. I made sure to take pill early and would take a half pill periodically if side effects were bothersome. By the end of first month side effects were gone except for constipation, and I was able to maintain 1400-1600 calorie per day goal. Around week 7 or 8, I noted that my appetite was not very suppressed, so I would eat breakfast, and take pill 30 minutes before lunch. This seemed to boost the appetite suppression for me. I walked 4-5 miles about twice a week. Hoping to continue diet and wt loss after stopping phentermine."

   
8.0

MF 37 July 6, 2016

22 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started a half a pill a days 5 days ago and I've already lost 5 pounds . I weighed 251 and I just now weighed 246. I have had some dry mouth but have energy to get up and do things that normally I don't have . Great product"

   
9.0

Hope2911 July 4, 2016

19 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I've been taking phentermine for 30 days now. Starting weight was 186. Current weight is 167. So happy! Didn't workout the first 2wks. Now I walk about 3 miles, 3x per wk. Side effects include dry mouth, constipation,and rapid heart rate. Recently experiencing stomach aches. Will take a few days off to assess what is going on. My Goal is 160 pounds. Good luck reader!"

Mrs. J July 2, 2016

33 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started watching what I eat three days ago and taking 1/2 pill a day for the last two. I have only experienced dry mouth- no jitters, no heart problems, nothing. I also have noticed a MASSIVE difference in my appetite- I have none. I have to make myself eat and am careful to eat healthy foods. I have lost 5lbs in 3 days. I know it's water weight, but I have to start somewhere and I'm thrilled that it's starting so well. Fingers crossed the weight continues to come off!"

   
10

Corey28 July 1, 2016

18 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"Ok so im 5'5 32 years old and I weight 151. I went to my PCP for a physical 6/30/16 and was telling her that I can't seem to lose the last 10 pounds. she recommended me to take Phentermine. She told me to take half pill a day only. and wants to see me in a month. Well I decided to take my first pill the next day 6/31/16 after breakfast I waited two hrs but I took the whole pill just because I completely forgot I had to take 1/2 .... Anyways after taking the first pill 30 minutes later I started experiencing dry mouth... Then I was hyper, jittery, then I could feel my heart beat a little faster, then I got the chills, I was a little dizzy and this is only after 1 pill... I was having all these symptoms for only 2 hrs."

Anonymous (taken for less than 1 month) July 1, 2016

13 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"Been on it week. My ob/gy gave for weight loss. It gives me alot of energy and I don't eat much like before the pill. I can tell how much I loss now. But I do see the difference in me. It only give dry mouth that all."

   
10

18999 June 30, 2016

12 users found this comment helpful. Did you?   Yes   No Report as inappropriate

Fastin (phentermine): "So the first tiime i took half a pill I had no side effects. However, the second time I took 1/2 with an empty stomach and I had to go to the hospital. My heart was racing and I couldn't breath the pain in my chest scared the shit out of me enough to stop using it all together."

   
1.0

GoldenRules June 29, 2016

23 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I took this for one year i battled weight proplems for years within the year i took this i lost 120 lbs with the doc watching my blood pressure this stuff worked wonders .its been 3 years since i stopped now...my weight is coming back i eat well and excersice daily so i am getting back on this wonderful pill to get back on track. It works and it works well"

   
10

Getting back on the pill June 28, 2016

32 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I am on my 45th day of taking phentermine, and I have lost 33 lbs. I had a little trouble getting to sleep the first few days, but fine now. It does give you a lot of energy which was one of my problems and does keep you feeling full. My weight when starting was 292 and I am now down to 259 in only 45 days. I am finally feeling strong enough to do the elliptical for a longer period of time. I started taking the drug to help lose weight because my doctor said I was pre-diabetic, and that was a year ago. So I fooled around for almost a year, going on and off diets and couldn't seem to stick to anything. I never liked the thought of taking pills. But I thought I would give it a try because I didn't want to get diabetes. Happy with it so far."

   
10

klover2016 June 28, 2016

27 users found this comment helpful. Did you?   Yes   No Report as inappropriate

Adipex-P (phentermine): "I started taking adipex two weeks ago and lost 8 first week. I haven't lost anything since. I do not have more energy and in fact get tired mid day. I actually can't even tell that I am taking it. I do eat less but that is about it and have dry mouth. I found a coupon online for Kroger and it only cost me $10.88 for a 1 month supply"

   
5.0

frustrating - ohio (taken for less than 1 month) June 28, 2016

20 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started on 6/14 at 237 lbs and today 6/27 I weigh in at 221. I drink a fruit smoothie, I make my own on a ninja blender, lunch salad wish avocado, tomatoes, spring mix, baby spinach and kale, olive oil and vinegar.. Dinner is normally a fruit salad, chicken breast, or protein shake, whatever I feel like, but not later than 1800. I also walk 3 miles, at least 3 times a week."

Mikky 41 (taken for less than 1 month) June 28, 2016

15 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started Phen on March 23rd and weight 193. As of June 27th, I weighed 169. My goal weight is 155. (I'm 5'10") I took a whole pill for the first couple of weeks...but, experienced extreme side effects - jitters, cotton mouth, breathing irregularities, constipation etc. I decreased my intake to 1/2 pill every morning and the side effect were more manageable. I now take the weekends off on the pill and exercise when my schedule allows. I eat extremely clean...Except for a couple of glasses of wine every now and then. I've also gotten the lipo shot 3 times since I've been in Phen."

   
8.0

39 Year Old Female (taken for 1 to 6 months) June 27, 2016

13 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started this medication a little over a month ago. I seemed to have a lot more energy at first and as of today I've lost 10 lbs. A few days ago however, I began experiencing chest tightness and shortness of breath. I went to my PCP who then sent me to the ER. I completed multiple tests and stayed overnight in the hospital for evaluation. Everything came back without any definitive answers as to the symptoms I've been experiencing. Several doctors mentioned that they believe the Phentermine to be the cause and recommended that I stop using it. It is now day 4 without taking any and I'm still feeling the same symptoms. Only time will tell... if I feel better after a week then I suppose they were correct."

   
3.0

Smh777 (taken for 1 to 6 months) June 27, 2016

10 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started phentermine 3.75 last Wednesday, no weight loss yet but my energy threw the roof and my appetite is pretty much gone."

   
5.0

m00nshine June 26, 2016

10 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"Hello, I'm female, 45. I am 5'3 and when I began Phentermine, I weighed 183. I asked my doctor what I could do. After 33 days on 37.5 mg, am down 15 lbs. I had been on it years ago, lost weight, gained it back. But I'll divulge this: I was not committed to weight loss my last go-round, and I was drinking very heavily. Now, I have a totally revised lifestyle: I no longer drink, and keep active, averaging a mile brisk walk daily. I get more intensive and go on hikes, vary my routine. I suspect some if the folks reviewing aren't on real Phen. This is NOT an OTC product, nor is it mail order. It's a controlled substance RX. This is not the "Fastin" from drug stores. Please don't be mislead by imitations. It works wonders if used correctly."

   
10

Brattyjenn (taken for 1 to 6 months) June 26, 2016

26 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I am hyper can't sleep"

   
8.0

Michelle Rachel Adams June 23, 2016

11 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started taking phen 5/16/16 and weighed in at 228. When I went in on 6/17/16 a month later the Dr weighed me and in at 212 I am very happy with what I am seeing my doctor allows me to be on only 60 days and I get off a months and start again if still need it I eat less now and workout about 20-30 minutes a day I drink only water and cut out sugar it been working so I lost 17 lb on my first month hope to loss a few more"

MrsRev June 23, 2016

10 users found this comment helpful. Did you?   Yes   No Report as inappropriate

"I started Phentermine 37.5 on Sunday June 19th 2016 as prescribed by my dr. I take 1 pill 20 mins before my breakfast. So far no side effects at all, took my 3rd dose today. Starting weight on 06/19/2016 was 218 still same weight this morning, so we will see. Hoping to reach a goal of 175 by Nov. That's 9 lbs a month, so we will see!!! I'll update in 2 weeks"

   
4.0

Anonymous (taken for less than 1 month) June 21, 2016

23 users found this comment helpful. Did you?   Yes   No Report as inappropriate

Adipex-P (phentermine): "I started adipex on 5-23-16 exactly 4 weeks ago from today. From the first day I took it I noticed a huge difference. I lost almost all appetite, and had to force myself to eat even though I wasn't hungry. The best thing about it is when I did eat I took the time to think about what I was putting in my body and made better and healthier choices. There are times when I wanted something I knew wasn't good for me, but my will power is stronger and I turned from it. I drink only water...It helps me stay full. I also have been working out 2-3 times a week. Only side affect I've had was dry mouth the first week. I went to the doctor today and I've lost 23lbs in 4 weeks. I recommend this to anyone struggling with weight loss."

   
10

SarJef. June 21, 2016

77 users found this comment helpful. Did you?   Yes   No Report as inappropriate
Page 1 2 3 4 5 6 7 8 9 ...Next
Hide