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.

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Condition DownUp Reviews Compare Avg. Ratings DownUp
Obesity 138 reviews 54 medications
   
9.2
Weight Loss 812 reviews 27 medications
   
9.0
Summary of Phentermine reviews 950 reviews 9.1

Reviews for Phentermine

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Review by Sapphire Roses:

User Rating:  
   
10

For Weight Loss: I was a hard core Atkins dieter in my early 20's, lost a tremendous amount of weight, and kept it off for 5 years. I then got pregnant, stopped eating healthy and gained everything back and then some. Now I'm in my 30's with my highest weight being 218. I started back on the Atkins and started exercising but my weight was not coming off like it did when I was in my 20's. My doctor prescribed phentermine and I've lost a pound every day, I'm finally out of the 200's and down to 198 today (never thought I'd see the day). I have had dry mouth occasionally with no other side effect. I've been exercising and eating low carb and feel great. I hope to be 135 someday.

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October 22, 2013 7:23 AM

Review by C. B.:

User Rating:  
   
8.0

For Weight Loss: Pro's: Unbelievable amount of energy (not kidding, if I was not concerned about my health, I could work 5 days a week on 2 hrs of sleep every day if I take a single Phentermine at 7am with topiramate which causes sleepiness), works to suppress appetite for me so I can easily eat a healthy low calorie diet with supplementation, minimal dosage needed, helped me painlessly lose 46 lbs so far w/ lifestyle changes! Con's: Unbelievable amount of energy (on the flipside, if I ever took this past noon, no sleep would be had), sometimes I had an agitated mood immediately after taking it (being easily angered.. the effect limits itself to the first 30m-1hr after I take it after the first 1 week), extreme exertion was not recommended while on it

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October 19, 2013 11:24 PM

Review by Ali4:

User Rating:  
   
10

Adipex-P (phentermine) for Obesity: I am 5'5", and 31 yo. I have been overweight my whole life. Even as a child. At my heaviest I weighed 256lbs. I could hardly make it up and down the stairs. That is when I started taking Adipex. I am now 149lbs, and feel amazing! I know that there are side effects with every medicine, but there are also side effects to being overweight. Honestly, it is not easy to being weaned off. You have to work hard everyday, not to cave into the cravings, and keep active. It gave me the edge I needed to make that life change. Other friends that have tried using Adipex, but could no stick to the diet and exercise plan and lost little to no weight! You need to want to make the change, the pills just help.

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October 18, 2013 10:35 AM

Review by Michele chest (taken for 1 to 6 months):

Adipex-P (phentermine) for Weight Loss: I have been on it now 5 months and when I started I was 242lbs, today I am 176lbs, that is 66 lbs down and I feel great.

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October 11, 2013 3:45 PM

Review by StephVon (taken for less than 1 month):

User Rating:  
   
10

For Weight Loss: I have been taking phentermine for exactly a week today and I've lost 8 pounds, going from 182lbs to 174lbs. I'm so excited and hopeful. The only side effect that I experienced was a little sleeplessness, but it subsided after three days. I can't believe how much energy I have and the advantage this gives me over what I eat. I'm learning how to eat right and exercise daily. Only 42 pounds to go!

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October 10, 2013 6:40 PM

Review by Curly Sue:

User Rating:  
   
6.0

For Obesity: I have been on this medication for a little more than a week. I have lost about 12 pounds so far. I think it's important to note that everyone experiences the medicine and side effects differently. Some of these reviews would lead people to believe that your cravings go away entirely. For me, they haven't. But seeing the numbers go down on the scale when I make good choices has given me the confidence and support I need to resist the diminished cravings I have. As for side effects, I had 3 days of really bad nausea and stomach cramps about 2 days after starting the medication, but it resolved itself. No insomnia or jitters. A little dry mouth, but nothing unmanageable.

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October 10, 2013 11:17 AM

Review by Diana30:

User Rating:  
   
8.0

For Weight Loss: I'm 30 years old and have been overweight since the birth of my second child when I was 22. I was always thin in my youth, but packed on 65 pounds with the pregnancy that I had a hard time getting off. My review is both as a patient and also as a nurse. This works great! I have tons of energy and my metabolism is super high. I had virtually no desire to eat at all in the beginning. But it's only supposed to be used as a very short term aid to help you make better lifestyle choices. Unfortunately, I have seen in myself and in many of my patients that once you stop, the weight will start to creep back up. The metabolism will readjust to where it was pre-medication, which means you will have to work even harder afterwards to keep it off.

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October 8, 2013 8:59 PM

Review by jacs (taken for less than 1 month):

User Rating:  
   
9.0

For Weight Loss: I started taking it on October 1st, it is now the 6th and I've already lost ten lbs. I don't have that much more energy, but I don't have cravings or really get hungry but I make sure to eat three small meals a day. I don't drink anything except water. I am really active at work. I make sure to eat breakfast or I'll get a headache for the rest of the day. I stay away from bread and pasta. This pill is honestly a miracle worker but I feel that for me to keep all weight off I have to eat. I can't starve myself.

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October 6, 2013 8:07 PM

Review by HoneyBearLee:

User Rating:  
   
10

For Weight Loss: This is so awesome reading everyone's reviews. These are real reviews to me. You read other diet adds, they are not real. I started in late August, 28 2013. I have lost a total of 15lbs so far! Looking to lose more. I was near the 200 lb mark. It's been like that since I had my last child in 2005. All this time I had been working out, I saw no changes. I needed a change because I have insulin resistance. That is scary to me. Diabetes runs in my family both parents. I love this pill!. It's amazing how much energy I feel. I did feel jittery when taking at first and not feel hungry but I ate anyways. I watch what I eat. Insomnia and dry mouth. Drink lots of water. I just want to feel better about myself.

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October 5, 2013 11:51 AM

Review by Senoritapattytx (taken for less than 1 month):

User Rating:  
   
8.0

For Weight Loss: Started phentermine on September 6, 2013 weighing at 183.5lbs. I had my appointment at my doctors today and I weighed in at 164.4lbs. I have lost close to 20 lbs in 1 month. I am taking the 37.5 mg pill in the morning and 1/2 at noon. Side effects are dry mouth but I drink lots of water, which is good for me anyway. My goal is 135 lbs and I work out 1 hr 5 days a week.

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October 3, 2013 6:44 PM

Review by Gratefull:

User Rating:  
   
9.0

For Weight Loss: I have just started with Phentermine as of this past Friday and am now on day 4 today. I had spoken to my doctor about it a month a go and he challenged me to loose some weight on my own first, and I did, 6lbs in a month. My doctor was concerned about my obesity and put me on this and I honestly feel wonderful. My cravings are gone! I work 10 hours a day at a desk job, on the phone and do not get much movement other than my occasional jont to go refill my water or breaks. I feel so great, and I have so much more energy. Since Friday, I have now lost 3lbs more. I make sure I drink at least half my body weight in oz in water daily if not more and my appetite is nil. I have to make myself remember to eat.

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September 30, 2013 4:47 PM

Review by MimiLuv:

User Rating:  
   
10

For Obesity: I am 23 years old, 5'8''. I started Phentermine Sept. 25th at 255 pounds. I have been working out way before I started the pill and had lost about 20 pounds but then hit a plateau for about a month. I still workout everyday and replace breakfast and dinner with natural fruit shakes, any fruit I like just add water, protein, for lunch I have a salad with any meat cooked with no oils. I drink plenty of water and workout for about 1 1/2hrs 6 days a week. Today is day 6 on the pill and I weigh in at 248.2lbs. The only negative side effect is some insomnia.

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September 30, 2013 1:38 PM

Review by Ja-La (taken for 1 to 6 months):

User Rating:  
   
10

For Obesity: I started taking the medication in mid May, and will be off mid October. I weighed in at 208lbs, at 5ft tall. I gained a lot of weigh after a serious injury last year. The only side effect I experienced was insomnia. For the 1st month, only slept 2-3 hrs/night. Good thing it gave me a lot of energy because I wasn't really tired. After a month my body adjusted and I slept longer periods. From the injury wasn't able to exercise, but still went from 208 to 152lbs! Its a miracle in a bottle. Dr recommends taking me off for 2 months, then will begin again mid December. Hope to lose last 37 lbs. Goal 115lbs.

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September 26, 2013 3:22 PM

Review by they work (taken for 6 months to 1 year):

User Rating:  
   
10

For Weight Loss: They really work.

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September 25, 2013 11:16 PM

Review by 0325love (taken for 1 to 6 months):

User Rating:  
   
7.0

Adipex-P (phentermine) for Weight Loss: The first 3 weeks of this medication I lost 17lbs, with little to no side effects. However, at exactly the 3 week mark I began having nothing but watery bowel movements accompanied by gas like cramps. This has gone on for 4 weeks almost everyday. I have now lost a total of 30lbs. So yes, it curbs hunger, charges your metabolism, but you can't leave the house to show off your weight loss or be active because you are stuck in the bathroom for hours at a time. I am now quitting Adipex so that it does not cause long term problems. It's a great kick start for a lifestyle change but the side effects are not worth it to me.

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September 21, 2013 1:43 PM

Review by Hopefulbride:

For Weight Loss: I started Phentermine this past week. I visited my doctor for a different issue and she commented that she had noticed I gained some weight since the last time I had been in. I had been noticing weight gain over the past few months (some due to birth control) and I knew I had to do something about it, but just didn't know what. I exercise at least 3 times a week, sometimes 4. It just wasn't coming off. So she prescribed me this medication. So far, I have had NO cravings (which is awesome for me!!) and definitely decreased appetite. I started out at 174lbs on Monday (I am 5'3) and as of today-Friday I am 168lbs. I hope this continues as my wedding is in 2 months! I experienced some side effects: jittery, high blood pressure but has gone away.

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September 13, 2013 6:09 PM

Review by michele chest:

User Rating:  
   
10

Adipex-P (phentermine) for Weight Loss: This is my second post, I have been on this diet for 4 months. I started at 242lbs and now I am 188lbs and I feel great. Don't give up hope it does work if you put your mind to it.

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September 9, 2013 10:44 PM

Review by Bigapril66:

User Rating:  
   
9.0

For Obesity: Started taking phentermine, August 30, 2013. Weighed in at 219lbs. Weighed on Sept 4 at 212lbs. So it is working. I don't have a lot of energy. I was working out 2 to 3 days a week before I started. So today I'm taking B12 supplement to see if that will help me. Overall it's okay and I need this weight off of me. It's not attractive.

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September 7, 2013 7:39 AM

Review by cat1555:

User Rating:  
   
9.0

For Obesity: I started this medication last week and it has definitely curbed my appetite. I have to force myself to eat. I have been battling thyroid issues for years and can't seem to drop weight even with exercise and a 1300 calorie a day diet. I'm really hoping this works. I've lost 4 lbs since starting it last week. I started out weighing 248lbs and I'm 5'9.

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September 3, 2013 10:58 AM

Review by Rachael78:

User Rating:  
   
10

For Obesity: I took this medication for 5 months from April 2012 through September 2012. I used this medication as a tool. I changed my lifestyle and thought of this pill as one toll to assist in my lifestyle change. I started at 178 pounds and I met my goal weight of 115 pounds in December of 2012. It is now Sept 2013, I have maintained my weight. This is not a miracle, for lasting results you must eat right, workout and keep a healthy lifestyle. It was wonderful in assisting me. If you do not do the work, as soon as you go off the medicine, you will gain the weight back.

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August 31, 2013 7:48 PM

Review by shelby2012:

User Rating:  
   
10

Fastin (phentermine) for Weight Loss: I started taking Fastin a few days ago after I read so many good reviews...I must say that I did take the advice of so many others and started with half of the pill. It seemed to put me in the best mood and my energy level went through the roof. Not to mention..I wasn't hungry at all. Yes it did make me feel a bit jittery so I drank a lot of water and had to pee quite often. Don't drink anything with caffiene in it while taking this because it makes you even more jittery, plus if you work in the heat be careful because I felt like I was having hot flashes but wow...it is definitely worth it. Lost a couple of lbs already. Well worth it for me.

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August 30, 2013 10:16 AM

Review by Liz8617:

User Rating:  
   
10

For Weight Loss: I started a weight loss plan June of 2012 and have lost 45 lbs. It was a slow loss, but I know I did it the right way. The past couple months, I have hit a major plateau. The number on the scale didn't change. I started at 250 and it stopped at 205. Last week, I started Phentermine and I have lost 9 lbs in 5 days! This is just what I needed to get past this plateau. I will only be on it for 3 months total, but I'm confident that I will reach my goal. Also, achieving the majority of my weight loss with no medication assures me that I'll keep it off!

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August 28, 2013 7:42 AM

Review by LindaShay (taken for less than 1 month):

User Rating:  
   
10

For Weight Loss: I've been taking phentermine for 1 week and I've lost 15lbs. Day 1, I weighed in at 271lbs and exactly 2 week later 256lbs. I've weighed in almost everyday because after the first day I'd lost 5lbs and I couldn't believe it. I feel nauseous a lot and don't desire any food but overall I'm having a good experience.

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August 24, 2013 10:16 AM

Review by Blanc1g (taken for less than 1 month):

User Rating:  
   
9.0

For Weight Loss: I've been on this medication for a little over a week and it is working. I began at 295lbs and am currently weighing 280.6lbs. Now, although it is working, I feel a bit of nausea most of the day. I also have briefly felt a bit of discomfort in my left arm. However that occurs rarely. I just don't care for the persistent fuzziness and the nausea. But I love the weight loss.

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August 16, 2013 8:32 PM

Review by Oscar2:

User Rating:  
   
10

For Weight Loss: I'm a 54 year old male, no medical issues except weight. I started phentermine on July 18, 2013 at 250 lbs. I weighed in today at 233 lbs. I've lost 17 lbs in 28 days. I've eaten mainly meat and vegetables, drank water only, lots of water. I exercise 3 times a week cardio and weights for about 1 1/2 hours. The only side effects I've experienced is a dry mouth and occasional minor dizziness. I would highly recommend phentermine for any one who is serious about losing weight.

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August 14, 2013 9:09 PM

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