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Fastin User Reviews & Ratings

Fastin has an average rating of 7.1 out of 10 from a total of 81 reviews on Drugs.com. 70% of reviewers reported a positive experience, while 25% reported a negative experience.

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Weight Loss (Obesity/Overweight)  
7.1
81 reviews for Weight Loss (Obesity/Overweight) 61 medications
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Reviews for Fastin

  • bigpita
  • June 26, 2014

For Weight Loss (Obesity/Overweight) "I started Fastin 30mg from my doctor on May 19, 2014. You need to change your lifestyle, not just pop a pill and be done with it. Because if you don't change, the weight will return. I started at 285 lbs, in one month I lost 25 lbs and feel great. I changed myself with habit changes and exercise. I told myself that when this weight is gone, it's staying gone, so I changed my lifestyle and you can do the same."

8 / 10
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260 Report
  • pitbu...
  • Taken for 2 to 5 years
  • July 7, 2015

For Weight Loss (Obesity/Overweight) "I started taking this pill when I was 218 lbs and I now weigh 135 lbs! I had thyroid issues too that originally caused the weight. But once managed, I still had a hard time getting the weight off. This pill literally changed my life! Yes, it does speed up your heart; my doctor did an EKG beforehand to make sure it was safe to take. But the results are beyond worth it. And if you take it with water or juice and a banana, you'll be good to go until dinner time! It took roughly 6 months tops to lose the weight, and I've maintained the weight loss for about 3 years now. I still fluctuate a little due to my thyroid. But I just start back on it if I need to lose again."

10 / 10
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193 Report
  • EHEHE...
  • June 6, 2017

For Weight Loss (Obesity/Overweight) "This is my 3rd time using these pills. The first time was in 2012, I lost roughly 35 lbs. I started again about 2 months ago. I kept the weight off for about 4 years, then got too comfortable and gained weight, so here I am. Along with everyone else, when I first took an entire pill, I too thought I was going to die. LOL funny but not funny. I started breaking the pill in half & I had no more issues. I DO NOT recommend taking these pills on an empty stomach. Eat first, take with WATER no caffeinated beverages or juice. Drink at least 16 ounces of water with it, and you more than likely will not have any more side effects. I feel completely normal when taking the pill as mentioned above. Hope this helps!"

10 / 10
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151 Report

Frequently asked questions

  • happy...
  • Taken for 1 to 6 months
  • May 13, 2015

For Weight Loss (Obesity/Overweight) "Fastin is an excellent dietary supplement for me. In the morning, right as I wake up, I take the little guy. The pill tastes like what I would imagine what baking soda would, but oh well, I am not sucking on it. It takes about 20-30 minutes to give the first kick. That kick is the rush that says 'I need to get moving or I need to get to the gym.' The first time I took the pill, I did get a little jittery and nauseous, but once I started working out and drank water, I started to feel fine. About an hour in, I hit phase 2. Phase 2 is the spunk and mood booster. I feel awesome and amazing like I know what I am working for. Again, the first day I felt a little dizzy and euphoric. Then there is phase 3, the come down. Drink water and eat a solid. I lost 100 lbs."

8 / 10
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177 Report
  • Elena
  • Taken for 1 to 6 months
  • November 24, 2013

For Weight Loss (Obesity/Overweight) "I have been working out for the past year and a half. I've taken many kinds of diet pills, and let me tell you, this is by far the BEST thing. I've lost 35 lbs, and I feel wonderful. I do feel a little jittery, but I can handle that. It's great, and I hope it never goes away. Love it!"

10 / 10
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162 Report

Are you taking this medicine?

  • Serina
  • February 27, 2014

For Weight Loss (Obesity/Overweight) "I just started using Fastin and I like it better than other diet pills I've tried, such as Hydroxycut, because it doesn't make me feel sick or nauseous. However, it definitely makes my heart rate skyrocket, so for the first couple of days, I would only take half a pill at a time. A full pill makes my hands tremble, and I can hear my pulse in my brain."

7 / 10
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144 Report
  • Crazy...
  • Taken for 6 months to 1 year
  • January 8, 2020

For Weight Loss (Obesity/Overweight) "I’ve been taking Fastin for about a year. And took it for a few months the year before. I love this medication. It helps me not be so tired. I take it as soon as I wake up and I’m good for the rest of the day. When first taking it make sure you eat a little something otherwise it will make you feel sick. It does make your heart rate go up. I don’t mind it because I know you have to get your heart pumping to lose weight. Went from a large 16-17 to a 11-12. 205lbs to 160lbs in past year and I’m only 5ft 2in. (I have large hips). It helps me have energy that I haven’t had since I was a teenager. And I only take one tablet in the morning. This medication is a blessing to me!"

8 / 10
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76 Report
  • Margo...
  • April 1, 2016

For Weight Loss (Obesity/Overweight) "So I was taking phentermine for a month and lost 15 pounds. I stopped taking it because it cost too much every two weeks to go to the doctor and get medication. I googled pills like phentermine, and this one came up. The pills look the same except phentermine is smaller. I took half a pill of Fastin instead of the whole thing, and it feels stronger than a whole pill of phentermine. So if you're new to this pill, I would do only one pill a day and split it in two. It works as an appetite suppressant and an energy booster. I definitely would recommend this. But please take only one pill a day instead of two and split it in half."

8 / 10
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110 Report
  • mzbcoop
  • Taken for less than 1 month
  • October 24, 2013

For Weight Loss (Obesity/Overweight) "I have been taking Fastin for a little over two weeks. I started at 150, and I'm currently 140. Fastin causes me not to be hungry as much and gives me energy. I do feel a little jittery sometimes and have a funny taste in my mouth. Overall, I'm pleased with my weight loss and will continue using Fastin."

10 / 10
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126 Report
  • shelby
  • August 30, 2013

For Weight Loss (Obesity/Overweight) "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 caffeine 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. I lost a couple of pounds already. Well worth it for me."

10 / 10
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119 Report
  • JJMS
  • October 14, 2014

For Weight Loss (Obesity/Overweight) "I am borderline average/overweight for a 5'3 woman. I just wanted to lose about ten pounds. Extremely effective, but as the other reviews state, two pills for me was way too much! Uncontrollable shaking, but the heart pounding was nothing less than frightening."

8 / 10
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106 Report
  • Bestw...
  • December 30, 2015

For Weight Loss (Obesity/Overweight) "Fastin, there's nothing like it. Amazing. You lose a pound a day if you eat breakfast, then take one, then lunch and another one, and drink a gallon of water a day. There's something with drinking that much water that allows you to drop a pound a day. You are going to pee every hour until the fifth day when your body gets used to a gallon a day of water... try it. When your heart races, take slow, gentle breaths until you feel your heart slow."

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88 Report
  • reeda
  • Taken for less than 1 month
  • January 23, 2015

For Weight Loss (Obesity/Overweight) "Started Fastin on Jan 4th, 2014. Start weight 278.9 lbs. Current weight on Jan 23rd, 265 lbs. History of high blood pressure, Type 2 diabetes (diet control), morbid obesity, dysphagia, and right knee cap issue. Goal is to lose weight to have knee surgery. It is my doctor's choice due to dysphagia and other related health issues. Good luck. God bless."

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94 Report
  • Chevys...
  • Taken for less than 1 month
  • October 24, 2014

For Weight Loss (Obesity/Overweight) "I took this and it's the best thing I have ever tried. The first couple of days I went by the directions then I doubled the dose. And I lost 20 pounds in 2 weeks. It did make me feel very jittery and my heart rate was going 90 to nothing but I was determined to lose weight.! And a little information DO NOT I repeat ( DO NOT ) take Fastin before you get in a tanning bed. Tan first then take it. It made me very very strange in a bad way. I'm no doctor but when I increased my dose I had the shaking and the increased heart rate. But It never harmed me."

10 / 10
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91 Report
  • Nurse...
  • November 8, 2016

For Weight Loss (Obesity/Overweight) "I am a 32 year old nurse and mom of 5. Before I started taking fastin, I was 269 pounds. I'm only 5foot 4 inches so needless to say I was huge. I was in size 24 jeans. I began taking these as a last ditch effort to help me lose weight and feel better about myself. This week I weighed in at 187. (I recommend only weighing once a week on the same day before you eat or drink anything). I am now in a small size 16, which are big on me. I will agree that it makes your heart feel like it is going to pound out of your chest, but that is how I felt when I exercised. I would be huffing and puffing and barely able to stand. So I feel that in order toactually burn off the fat, you have to pump the blood harder and faster. Works for the obese."

10 / 10
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71 Report
  • Straw...
  • March 27, 2016

For Weight Loss (Obesity/Overweight) "Today is March 26, 2016. Today was my first day taking fastin, I was scared out of my wits when I first tried one this morning before breakfast, I waited for all the bad adverse effects that I had been hearing about, but nothing bad happened even after my second afternoon dose. It made me kind of sleepy for the first hour or so, then my energy kicked into overdrive! No side effects what-so-ever, unless not eating is a side effect. I can't wait until in the morning for day number two! I'll keep you guys posted...keep in mind I kept clear of all caffeine, because these things are loaded with caffeine as is. I didn't get a chance to weigh in yet, so I'll update you on my weight also."

10 / 10
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74 Report
  • Shasi
  • September 11, 2014

For Weight Loss (Obesity/Overweight) "It really works, you must eat before Fastin, then go to the gym, if you feel your heart hoes quick. Just take half pill and everything will be right. I'm 35 year old and with gym and my half pill of Fastin I feel perfect in my weight of my 15 year's past."

10 / 10
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82 Report
  • yellow
  • January 22, 2014

For Weight Loss (Obesity/Overweight) "I took a pill this morning with some tea, and while I was eating breakfast I noticed my heart rate sky rocket, I don't know if this happened because I took fastin on an empty stomach or what, but this is a little scary! It literally feels like my heart is going to jump out of my chest! At first I didn't think I could be reacting to this drug so quick but apparently it's a very quick release type of pill. I can say that I'm not hungry and didn't finish my breakfast but at what cost?! Maybe I should try taking a quarter of the tablet, but I think I'm a little to scared and will probably throw the bottle away.. what a waste of $40 oh well better 40 bucks lost than a heart attack. Also I bought these over the counter at a Rite Aid."

1 / 10
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81 Report
  • Florida...
  • June 26, 2013

For Weight Loss (Obesity/Overweight) "I've been overweight all my life. I started recently getting really bad back pain and chest pains. I stepped on a scale and weighed 287 lbs! I was emotional, devastated, and embarrassed. I've tried everything but I don't give anything enough time. I don't have any patience. I tried Jenny Craig, regular diets, diet pills, and had a personal trainer, but nothing ever worked. So, I started taking Fastin last Friday. I'm not starving myself; I'm eating fruits, veggies, and lots of water. So far, 6 days later, I've already dropped 8 lbs! I'm so happy. I still have a very long way to go, but I do recommend Fastin."

10 / 10
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84 Report
  • Miche...
  • September 8, 2015

For Weight Loss (Obesity/Overweight) "I tried Fastin for the first time today which I purchased over the counter. With in 20 minutes I experienced a slight euphoric feeling. After 30 minutes, however, my heart started racing, my body and hands began shaking and I felt as though I was going to pass out when standing. I had to sit down until I felt in control. After 45-50 minutes the shakiness and racing heart improved as well as the dizziness when standing but didn't disappear completely for over an hour. My mood still remained lifted. I may just be sensitive to the initial dosage so recommend that anyone sensitive to stimulant medications begin with a half dosage to minimize the initial negative effects until your body gets used to the drug."

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61 Report
  • Mattz...
  • Taken for 2 to 5 years
  • October 9, 2019

For Weight Loss (Obesity/Overweight) "I’ve been taking Fastin on and off for about 5 years. I always take half a pill in the morning and the second half in the afternoon. It definitely kills appetite cravings and I have no desire for late night snacking. Drink a lot of water. It can affect your mood. There have been days when I feel just so angry just by someone looking at me funny. It increases heart rate and gives a jittery feeling but those side effects subside after a couple of weeks. It definitely works. I’ve lost 15 pounds in a month. Eat right and exercise and take this with precaution. I don’t recommend 1st time users taking a whole pill. You will feel like you are having an anxiety attack."

8 / 10
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36 Report
  • Crist...
  • June 4, 2008

For Weight Loss (Obesity/Overweight) "Phentermine has worked very well for me and my own personal situation. I was formerly anorexic/bulimic with a habit of severe calorie restriction, phentermine has worked amazingly. My metabolism went into hibernation after 5 yrs of damage & I gained 180lbs post rehab. By taking phentermine daily, I have the metabolism of a nomal 22 year old girl. I lost 30lbs/90 days initially. Now I'm losing 30lbs/month. Occasional moments of feeling weird/adrenaline rush is worth it."

9 / 10
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87 Report
  • Anonymous
  • Taken for 1 to 6 months
  • January 29, 2017

For Weight Loss (Obesity/Overweight) "Hello I'm 46 years old and I have a prosthetic leg so I can't get much exercise and I've gained a lot of weight I can't move around a lot and I've tried everything and nothing works for me and I finally came across Fastin I was worried about taking it but when I finally did I did not have to exercise because I can't it made me not want to eat much it control my appetite very well which nothing else worked no other diet pills I tried but Fastin made me start losing weight drastically I lost 5 pounds the first week and I kept losing it week after week I lost 20 Pounds in two months and I'm finally at my weight goal thank you Fastin I am so happy with my body now !!"

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46 Report
  • daisy...
  • June 16, 2016

For Weight Loss (Obesity/Overweight) "I used to take fastin/Fastin XR in 2012. Within a few short months, I went from a size 9/10 to a 4. I kept the weight off for 3 yrs after stopping this product. I’m only 5’3″, so all the extra weight on me was really noticeable. I didn’t like the side effects at all, shaking, racing heart…but it definitely worked. I just started taking this product again, a few days ago, because I’ve gained 35+ lbs within 4 months due to major lifestyle changes. I’m trying to get back on track again. Hopefully, I’ll get similar results this time around too."

10 / 10
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48 Report
  • Zaynab
  • April 23, 2008

For Weight Loss (Obesity/Overweight) "When I started taking this medicine in December along with Metformin and Simvastin I lost 66 lbs. I started at 306lbs and now I weigh 240lbs. I am unsure if the drug is having any effect on me any longer - I will know when I see my doctor again. Perhaps I am just at a wall for the time being. Anyhow I think it works great."

10 / 10
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81 Report

Reviews may be edited to correct grammar/spelling or to remove inappropriate language and content. Reviews that appear to be created by parties with a vested interest are not published. This information is not intended to endorse any particular medication. While these reviews may be helpful, they are not a substitute for the expertise, knowledge, and judgement of healthcare professionals.