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An FDA approved diet pill for obese patients.

QUICK FACTS Start the Diet Now Advertisement
  • Established: 1959 FDA approval; available in the 1970s; removed from the market voluntarily in 1997 but still available
  • Founder: Originally sold by King Pharmaceuticals; currently made by several companies
  • Accessibility: Prescription only
  • Diet Type: Appetite suppressant to be taken short-term
  • Gender: Male and female

Phentermine is a short-term prescription appetite suppressant that works by stimulating the hypothalamus gland and affecting neurotransmitters in order to decrease your appetite. The hypothalamus gland is the portion of the brain that controls many functions, including your appetite. Combined with proper nutrition and exercise, you can see weight loss results

  • Phentermine is given under doctor supervision
  • Formulated specifically for the obese
  • Documented success stories
  • Suppresses appetite
  • Short term help to lead you to eat healthy and exercise
  • FDA approved
  • Generic version available which is cheaper than name brand

  • Phentermine has the potential of many serious side effects, including: chest pain, fainting, swelling of feet or lower legs, trouble in breathing, among others
  • Currently available by prescription only
  • Not a long term solution
  • Side effects of dry mouth, blurred vision, constipation
  • Phentermine Hydrochloride (HCL), along with a host of non-active ingredients.

Your doctor will decide on your dosage and instructions for taking Phentermine when giving you the prescription. The average dose is 30mg of Phentermine per day, but some patients are prescribed to start off with 15mg per day.


It is recommended that you incorporate diet and exercise into your plan when taking Phentermine. Phentermine is a drug to be taken only on a short-term basis. After six to 12 weeks, you are advised to discontinue taking Phentermine, and continue with your diet and exercise plan to reach your weight loss goals. Phentermine is only intended to help the obese kick start their weight loss plan while they become used to following a low calorie diet and exercise plan.


When you're talking about a prescription weight loss drug, you have a product reserved for people with the most dire of needs. So, obviously this is not for everyone. If you have health problems related to obesity, and you fell you need help in getting some of your weight off, consult your doctor about Phentermine.

Common Misspellings

fentermin, fentermine, phentramine, phenterthin

Related Diets: Adipex-P, Alli, Fedramine, Phenterthin, Phentramine

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(Page 11 of 13, 248 total comments)


I have just started on phentermine tablets. With only 1/2 tablet once daily, I'm down three pounds in three days.

I'm shocked and hopeful with the results thus far. My frustration is that I enjoy exercise and am nowhere near a junk food junky, and yet my weight as slowly climbed over the last few years.

I believe that while I grab healthy things, it simply too much grazing. Phentermine has really put a stop to that habit.
I am 5'2" and 170 lbs.

posted Jul 27th, 2009 11:21 am


I have been taking Phentermine for less than a week and have already lost 10 pounds. I am 5'10 and weighed 300 lbs the day i started taking it. I absolutely love this pill. I don't even think about food anymore. I have not yet exercised, but I do plan on doing so.

I did nutrisystem for 8 months with fantastic results, but the day I went off of it I started gaining weight back. I was not even eating a whole lot of food.

Anyways, I defiantly reccomend this to anyone who is thinking about giving it a try.

posted Jul 20th, 2009 1:43 pm


My Dr. told me that @ 33 years old, 300+lbs, after many diet attempts, high blood pressure, and starting a new job as a truck driver that she did not like to prescribe pills for diets but we would try phentermine on a month-by-month basis. In 30 days I lost aprx 30 lbs and loved the results, as I don't eat a lot of bad foods. I just can't control quantities of the foods I do eat and as we all know even good foods at bad quantities are bad for you.
So the first month worked out great. I took the pill with my blood pressure pill and a one a day vitamin and was very impressed. I could eat two breakfast bars for breakfast instead of a large bowl of cereal, a tuna sandwich on wheat for lunch, and not be very hungry for dinner. I would eat something small like a half a sandwich for dinner.
But when I was on the road I could not get back to my Dr and she would not prescribe over the phone. I lost all momentum with my diet and have gained back 4 lbs. I am now home and have an apt set up. But I have to say I can't change my new profession and my Dr is not very flexible. I may have to buy them on line. I have seen plenty of sites. Does anyone know if they are legitimate or not?

posted Jul 20th, 2009 5:48 am

velega kerkula

I started taking phentermine two days ago. the first day I took only one pill for the hole day, and it kept me awake all night. the next day I took half of the the pill it still worked I was not hungry at all I was able to sleep.I do like it but I do not want to be on it for more than three months. I weigh about 195lb my goal weight is 150.I am 5 5". my diet is two bioled eggs after I take the half pill. for lunch salad.dinner steamed vege with some chicken or fish.lots of water. my snack is sugar free jello. I exercise for 30mins four times a week. i hope i can get the support I need from you all.

posted Jul 15th, 2009 10:30 am


I have been taking phentermine and a water pill since January 2009. I started out at 253 and I am now down to 219. This medication works and I DONâ??T work out. I know I should but I hate it honestly. I do try and push myself and workout at least twice a week. I know that sounds horrible but I try to focus more on my eating habits. I found out about Phentermine through a friend of mine. She referred me to a doctor that I go see once a month. He weighs me, makes sure my blood pressure is not too high, monitors my weight loss and talks to me about eating healthy and working out. This medication has been wonderful for me. I used to be hungry ALL THE TIME. After taking the medication in the morning, when I get up, I have more energy and it subdues my appetite. It doesnâ??t kill my appetite all together like it does some people. It never has. But it helps me tremendously. When I first started taking the medication I also did weight watchers. I did't go to the meetings but I was counting my points. Now I try to eat healthy and stay on a better food plan so when I stop taking the medication I can keep the weight off. I stopped drinking all regular sodas. I only drink diet soda now and try to limit that to 1 a day. I will eat a burger when I'm out every now and then but I don't get French fries. I try to eat more vegetables and buy low fat snacks that maintain me through the day. I eat fruit, low-fat yogurt, fat free cottage cheese, granola bars, fiber bars, etc. Every once in a while I will have a cheat day. After that I get right back on the program though. I work out very little and wish I could do more. If I worked out I could get my weight off much faster. I am 5'9....have lost 33 pounds and would really like to lose another 30 pounds. If you are considering taking this medication do a lot of research on it and take to your doctor. Some doctors will let you take the medication as long as you go and see them once a month for a check up.

posted Jul 14th, 2009 12:13 am


to kelsie with the tummy exersises: a better form of a sit up that u can def feel the burn and works both upper and lower abs is:

1- lie flat on ur back
2- place hands under head and life neck to chest
3- put ankles together
4- move legs up and down at a 90 degree angle and this will count as "1"


i recommend starting off with 30 and each time u exersise increase by 5 more

regular sit ups and crunches didnt do much for me but this does.. also it is easier on ur back and u feel the burn almost idmediatley.. GOOD LUCK!

within a week i realised this "miracle pill" on top of diet and exersise had toned me up and having an underactive thyriod its difficult to diet and exersise and see idmediate results.

posted Jul 7th, 2009 12:26 pm


I just got a perscription for this... I had no idea I was obese until today! I weigh 174 pounds and am 5'5".... I hope I can get back down to 140.

I'll let you all know if it works!

posted Jun 18th, 2009 7:11 pm


anyone know where i can buy it? my doctor refuses to prescribe any weight loss pills. Thanks!

posted Jun 9th, 2009 2:22 pm


I have taken Phentermine in the past and LOVED it. I just recently started taking it again to lose about 30 lbs. I am very excited. The only bad thing is that you are never hungry so you have to remind yourself to eat ! Crazy right ? Good ofcourse. Good luck to all that use this - It does work. !

posted May 27th, 2009 11:06 am


I just started phentremine today. I am so excited to finally do something for my weight. I have 2 kids under two and I am ready to beat the baby bulge. Does anyone have any workout suggestions to help with the tummy area??

posted May 23rd, 2009 11:23 pm


I have been taking this for about 3 weeks now...I work out 3x a week for 45 mins, cut out cokes and junk food, drink lots of water, and no eating past 6:30. With the phentermine, I take a water pill 3 days a week and get the Vitamin B-12 shot once or twice a month. Even with added muscle weight, I have lost at least 10 pounds and several inches and have started toning up really nice! :)

You just have to set your mind to it and follow through and you can do it!

posted Apr 27th, 2009 2:47 pm


well i just started takeing phentermine 3 day ago and i alredy see results and i love it no rapid heart beat no jitters at all and i got then only for 58 dollars off some web site i think called lipomex but i got 37.5 tablets and yes it dose work

posted Apr 20th, 2009 11:24 am


i just started mine i got mine 04/16/09 and i know it is working cause i can't eat so i have to forc my self to eat and have alot of enerig i runn ........anwyas i will let u all know how it goes when i go back to doc next month on 17 see how much i lost

posted Apr 18th, 2009 3:15 pm



posted Apr 1st, 2009 7:57 pm


i was on phentermine for a year i honestly lost 170 lbs no lie i love it its great and i recomend it to everyone...

posted Mar 30th, 2009 7:58 pm



posted Mar 24th, 2009 2:43 pm


I started taking Phentermine after my Dr. prescribed it for me and it does really work and it gave me alot of energy. I worke out at least 3x a week with very heavy kickboxing classes at least 1hr a class. but so far I've lost 40lbs and have toned up alot which added about 10lbs of muscle and before the phentermine that was not happening it will be about 6 months now and I even think it helped with my PMS.

posted Mar 23rd, 2009 10:48 pm


I have struggled most of my life with being overweight. I've heard good things about phentermine so I asked my doctor about it. I take the 37.5 ones. I LOVE IT!! In about a month and a half I have lost twenty pounds, and to be honest I haven't been working out or anything. Although. i probably should be. I cut out all cokes and snacks. The only bad thing is, is that I never feel hungry so i have to make myself eat. I've never been so happy. It was finally nice to find something that actually works. I've tried almost everything.

posted Mar 19th, 2009 2:15 pm


I begun taking Phentermine the middle of January 2009. When I started I was at 383 pounds. It is now March 10 2009, I am currently at 317. I have lost close to 70 pounds. This has not been without much effort. The Phentermine only takes away the hunger pains. It is almost like diet aspirin for your stomach. I also cut out all non diet pops, and all snacking. When I am craving a snack, usually late in the evening or at night, I will eat some carrot sticks or a banana. About a month after losing my first 40 pounds I began riding my bike thirty minutes a day. This also helped with my weight loss, as well as getting myself back into shape. My goal is to continue working out and get to 283 pounds by this July. I noticed in the past three weeks, the pills are still working, but my cravings have been a little stronger to snack. So there has to be some amount of will power included. I have been overweight for the past 15 years, and this has litterally been a life saver.

posted Mar 10th, 2009 11:56 am


i am 5'3 and weight 120 before i have my first child i gain weight and i try everything and nothing help up to my friend told me that her boss lose weight by taking this pill and a shot which is phentermine and a vitamin b 12 shot. that made her lose 25 lb in a month so i was like give me the add and number and i went and i start it to take the pill and the doctor give me the shot and in a month i lose weight i went from 200 lb to 183 i lose 17 lb doing nothing i was not eatting a lot but drink a lot of water and gatorade and 3 small meals a day . so went i went back to the doctor i was talking to some lady and she was like i do the 2 week treatment it makes you lose weight faster so i pay for the two week and it really work fast i lose 20 lb and i was happy with my self i never thougth that 20 lb will make me look like that and dress a lot better and sexy. time went by and i never gain the weight up to i have my other baby who 2 year now and i gain weight now am 203 and am back on phentermine 30 mg blue and white pill with a shot of vitamin b 12 and is going good am slim down and its only been 6 days and everybody is telling me what are you doing you lost weight and it make me feel better and my pants fit me loose cause they dont know this is my secret only my man know well and my sister and mami well thats about it lets see how slim i get before may 1 2009. i just think that the vitamin b help for went you do not eat and get the vitamin that you need went you losing weight . reply back

posted Feb 28th, 2009 11:49 am


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