Follow us:


This company is not yet accredited. See reviews below to learn more or submit your own review.

Get trending consumer news and recalls

    Thank you, you have successfully subscribed to our newsletter! Enjoy reading our tips and recommendations.

    Are you this business?

    Phentermine Reviews

    Sort: Top reviews
    Filter by: Any

    A link has directed you to this review. Its location on this page may change next time you visit.

    How do I know I can trust these reviews about Phentermine?
    How do I know I can trust these reviews about Phentermine?
    • 2,354,742 reviews on ConsumerAffairs are verified.
    • We require contact information to ensure our reviewers are real.
    • We use intelligent software that helps us maintain the integrity of reviews.
    • Our moderators read all reviews to verify quality and helpfulness.

    For more information about reviews on please visit our FAQ.

    Page 2 Reviews 10 - 20
    Rated with 1 star
    Verified Reviewer
    Original review: Feb. 25, 2020

    I believe taking Phentermine causes multiple sclerosis. After taking Phentermine for a month my daughter lost vision in her left eye. I rushed her to the hospital because she's only 25 years old. Was diagnosed with MS. She has never had any type of medical problems prior to taking this medication. I would give this product no stars if I could.

    23 people found this review helpful
    Rated with 1 star
    Verified Reviewer
    Original review: Dec. 21, 2019

    Would rate a zero if I could. I went to a dr regarding my difficulty losing weight. I am 49 and despite by regular activity, the 30 lbs I need to lose don't budge. He prescribed me Phentermine - 15mg when I wake up and 15 mg an hour after breakfast. I started 8 days ago and up until last night, the only side effects were dry mouth and staying up later than normal. In the middle of the night last night I woke up feeling off balance, just rolling over I felt off. I sat up and the room started to spin over and over. What felt like an eternity, only lasted maybe 15 seconds (15 seconds too long for me).

    I called my dr who said that vertigo is a side effect and to cut the dose in half. I also called the pharmacy. They said for the short time I am on it there is no need to wean off, so I am DONE with this pill. They say there is no magic pill and it's true. I praise those who have found weight loss success, but at what cost? I am otherwise healthy with a beautiful family. I am sorry I brought myself to a low point to rely on a pill to "fix" what I should do by eating better. DO NOT TAKE IT. NOT WORTH THE PRICE OF YOUR HEALTH.

    33 people found this review helpful
    Rated with 1 star
    profile pic of the author
    Verified Reviewer
    Original review: Dec. 4, 2019

    I feel like Phentermine has ruined my life. I'm a 27 year old female and other than being overweight, I have always been healthy. I complained to my doctor about not being able to lose weight so he sent me to a weight loss clinic and they prescribed me phentermine 37.5. Day 1, I had dry mouth, a lot of energy and no appetite. I thought it was great. I was barely eating and drinking almost a gallon of water a day. Day 2 and 3, same side effects but now I couldn’t sleep. I decided to take half a dose for Day 4 and 5 and was finally able to sleep. I continued taking the full dose on Day 6.

    By Day 9, I had lost 11lbs and I was ecstatic. But that was also the night I ended up in the ER. My resting heart rate was 180. I was shaking, pale and my lips were blue. I honestly thought I was going to die. They did blood work, and EKG. Both came out fine. I was told to stop taking the medication and that things would get better. Things did not get better. I was told to follow up with my PCP 2 days later but was unable to because of Thanksgiving. I had to wait 6 days before going to my doctor's appointment. During those 6 days of waiting - EVERYTHING I DID ELEVATED MY HEART RATE. Walking would make it go to 130, getting dressed 150, walking up stairs 165. Even laying in bed it would sometimes go up to 120. I literally was scared to get out of bed until my follow up appointment.

    I finally was able to go to my PCP. They performed another EKG. It was fine. But he was concerned he heard something in my right lung and feared it was a blood clot. He sent me to the ER again. I spent the day getting every test done, blood work, xrays, EKGs, ultrasounds. You name it. They did it. Every test came out perfectly fine. They sent me home. But still, everything I do elevates my HR. I am exhausted, feel like I cant breathe and it feels like someone is sitting on my chest. I am terrified to do anything because as soon as I do my HR goes up. I am suppose to follow up with my doctor in another 2 days. I was told if it doesn’t improve I may need to get on medications to control my HR.

    Had I known this pill would cause all of this harm I would have never taken it. I wanted a shortcut and easy way out. And now I dont even feel like myself. Please just try to eat healthy and work out, slowly but surely. Ive done it before and regret not trying to lose weight the healthy way again because now I can barely even walk without feeling out of breath. I’ve been off of the medications for 7 days with no improvements. If this review can stop anyone from taking this pill I will be happy it saved someone.

    78 people found this review helpful
    Rated with 1 star
    Verified Reviewer
    Original review: Nov. 12, 2019

    I started taking Phentermine 6 months ago I was losing weight really good. My last month changes started to happen. I was enraged at everything. I felt like a balloon about to burst. I've never felt that way before. I became withdrawn and has mood swings. I wasn't sleeping. My heart was pounding. My mouth was dry and so were my eyes. I had to have a colonoscopy and they told me to stop taking the meds 5 days before I did. When they hooked me up to the monitor I was told my heart was beating resting 125bpm and they were going to have to give me medication to slow it down that I could have a stroke or heart attack that scared me half to death.

    I looked it up when I go home and it has its own name Phen-rage?? I read on about it and I believe it to be dangerous. It was the other half of the ** back in the day that many women died young from heart disease. I don't think it's worth the damage to your body trying to lose weight just get yourself on a diet plan and exercise. I'd never ever take these again or any other diet pill. Read up before you take this. Has I know the side effects I wouldn't have taken them. I stopped them immediately and have slowly come back. Please read Phen-rage you will see how dangerous this medication is.

    41 people found this review helpful
    Rated with 4 stars
    profile pic of the author
    Verified Reviewer
    Original review: Oct. 18, 2019

    Phentermine works. Benefits: Healthier, Sexier, More Confident, and Better Sex, your old clothes starts to fit again. Pitfalls: Anxiety, Deep Depression, Sleeplessness, and Constipation, and Bad Mood Swings.

    51 people found this review helpful
    Rated with 3 stars
    profile pic of the author
    Verified Reviewer
    Original review: Oct. 1, 2019

    Phentermine is meant to be used in conjunction with diet and exercise. If you can put all three together for a month or two, you'll see some results. The key is to learn to exercise and eat properly while on the diet. Because when you stop using Phentermine, your appetite will come back in full force. If you have a balanced diet and a solid exercise routine when you stop, then you should be able to maintain the results.

    For men, the side effects can be brutal. I suffered from high libido but also erectile dysfunction. Your genitalia may shrink some. Just these sexual health changes alone are enough to cause mental health issues. That's not including increased blood pressure, dry mouth, etc. If you are at a point where you are close to your goal weight, and can stand the side effects the drug may cause, they definitely go for it under the supervision of your doctor. It definitely can help.

    36 people found this review helpful
    Rated with 5 stars
    Verified Reviewer
    Original review: Sept. 24, 2019

    Got this after 2 years of chronic neck pain and migraines that prevented me from working out. I was very active and when I started getting medical issues I was unable to work out as much but I was continuing to eat without burning off those additional calories. Gained over 50 pounds which made my medical issues worse so my Dr. prescribed **. I did get headaches for the first 3 days then took half of pill the 4th day. With half of pill I still had cravings so the 5th day took the whole pill and my headaches subsided. Side effects for me were constipation but I took fiber gummies and that helped. Also insomnia. I usually slept 8 hours but on this I slept 5-7 and couldn't fall back asleep. It did help with energy and I was more motivated work out.

    Lost 16 lbs the first month, 13 the second month and I'm on my last month right now hoping to lose at least another 10. You MUST adapt to a healthy lifestyle and exercise. This is not a miracle drug where you take it and still eat crappy. Don't take it and still eat McDonald's and not exercise. Because it's a stimulant you will have more energy and if you just sit around then it will cause you to be jittery. I think the cravings will come after my 3 months but I am hoping my body is less hungry since I have been used to eating smaller portions. Overall ** helped me start getting my life back.

    46 people found this review helpful
    Rated with 3 stars
    Verified Reviewer
    Original review: Sept. 19, 2019

    My first day taking Phentermine. I had it at 6am, fell back asleep, woke up at 730am, no symptoms. Went to work, feel fine but talked a lot more. It's been 9 hours since and I feel fine, mouth is not dry at all, no dizzy spells, no heart palpitation,s did sweat when I started to clean up. I had a power nap and don't feel starving I could eat if I wanted to but honestly can't be bothered making anything so I'll see how I feel in the morning. All I had today was peanut butter toast for dinner.

    69 people found this review helpful
    Rated with 1 star
    profile pic of the author
    Verified Reviewer
    Original review: Aug. 17, 2019

    I began taking Phentermine when I was 28 years old, I needed to lose 20 pounds. The medication gave me instant loads of energy and lifted All my depression. I felt like superwoman of the universe. I was happy and full of life. I excelled at my Nursing job. The weight fell off. I had no appetite. Most of all I could work 10 hrs daily and me and my fiance could dance all night. The only disturbing side effect at the time was very dry mouth. My self confidence soared. Since the medication took my depression away after I lost the 20 lbs I continued to take it. This medication most dangerous side effects are Addiction.

    Long story short I became addicted to this Phentermine. I didn't want to live if I couldn't take a lot of it daily. I got down to 89 lbs and the same Dr was still prescribed it. I lost everything in life. I overdosed hundreds of times and nearly died many times. I couldn't hold down a job. Didn't want to live anymore. I was on this horrible drug for 4 years. The Drs will lie to you and tell you it's not addictive. Trust me it is. My advice don't take this drug....

    110 people found this review helpful
    Rated with 2 stars
    Verified Reviewer
    Original review: July 24, 2019

    The first time I used Phentermine, I had a great experience! I am 5'2" and weighed about 145 lbs. I lost 20 lbs. after a month of use along with CrossFit exercise. My side effects were: Dry-mouth (which I thought worked out great since I needed to drink plenty of water to get healthy) and the second side effect was an insanely high libido (which initially worked out great for my husband but it got to the point where he couldn't keep up 3x a day at least for a few weeks!). I will say on my workout rest days my heart would race if I took Phentermine without working out. So I would end up jogging or using the elliptical just to sweat it out a bit!

    The second time I used Phentermine was 4 years later. Same situation, had 20 pounds I wanted to shed and because my first experience was overall great I didn't think twice about using Phentermine to help reach my goal. The very first morning, pill number 1, I was very excited. Took the pill, drank plenty of water and drove to run some errands before hitting the gym. I began getting very agitated at everything, drivers, people, grocery staff, everything just drove me mad!

    I got home to drop off my groceries and I began having suicidal thoughts. Mind you, aside from a little weight gain I dont have any medical issues, I dont take any other medications. I've never had any mental health problems and I've never contemplated suicide in any way shape or form! However, on this day I began to have thoughts about how everyone would be better off without me, how I'm such a failure, etc. (I am happily married with 3 well behaved kids. All honor students never given me any grief to condone me feeling this way.)

    I dropped everything and told my daughter what was happening to me. She did her research and threw away the pills and kept filling me up with water in a desperate attempt to flush it out of my system. I spent the next 24 hours wanting to kill myself. Literally, planning how I should die! Wtf?! As soon as it left my system I was back to normal. My period wasnt due for another 10 days so I know I wasnt PMSing and even if I was I've never experienced such a thing. Worst day of my life! Never again! PLEASE BEWARE BEFORE TRYING THIS DRUG!!!

    59 people found this review helpful
    Loading more reviews...

    Phentermine Company Information

    Company Name: