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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 12 of 13, 247 total comments)


I have a appointment on wednesday to start the phentermine diet and well... to be honest I smoke weed sometimes. I was just wondering if anyone knew if that would cause serious problems??

posted Jan 19th, 2009 11:30 am


i loved phentermine i lost a total of 30 pounds want to keep taking it but where can i buy it please let me know where to find it

posted Jan 9th, 2009 10:04 pm


This is a great medicine. I have lost 15 lbs in a month and a half. I have only had to exercise minimally, 3 days a week for 30 mins. I have took the medicine in both ways, and it seems better to half it and take Ā½ 45 mins before lunch and the other half 45 mins before dinner. Itā??s great for hunger control. There are a few side effect at first. It gave me dizziness, fast heart rate, it is basically like drinking a cup of espresso, but after a few weeks you donā??t feel any effects and continue to lose weight.

posted Dec 31st, 2008 2:00 pm


I am a diet fanatic and have tried all sorts of them. I love the way phentermine works but I did not like the side effects. I decided to try Phentramin D and am down 59 lbs in six months. I couldnt be happier.

posted Dec 5th, 2008 11:51 pm


i have been taking doctor perscribed phentermine for a years or so now it works great but does keep you awake at night if you take it to late at night. i lost 30lbs the first month i was on it. I forgot to eat on a regular basis. It supresses your apitite so you have to becareful to make sure that u still eat. If you dont then you will loose alot of wieght but you could damage your organs by starving them. If you take this drug please monitor what you eat. If you are responsible with it youll loose wieght and be healthy.

posted Nov 30th, 2008 3:53 pm


I have been on it for one week now, feel great, just get disappointed when i step up on the scale and have only lost about three pounds, I guess i'm looking for the scale to drop like 20 in a week? Other then that i'm exercising daily and eating better, so maybe in the long run things will work out!

posted Nov 26th, 2008 4:03 pm


It works but it doesn't last and overtime will cause damage and leave you with no metabolism. I t also causes inflammation and sodium problems.

posted Nov 15th, 2008 8:36 pm


i took phentermine about a year and a half ago and lost 18lbs in about 2 months without and real exercising and eating somewhat good since then didnot gain any back about 2 months ago i started taking it again and have lost 22lbs so far. this time i am also eating proper and exercising 6 days a week. it is working great for me with a good eating habit and exercising of course. i do recommend your doctor to closely montior you though. good luck with your weight loss

posted Nov 12th, 2008 8:27 pm


It does control the appetite. However, it made me feel very weird. I felt confused at times, my focus was off. I felt agitated. It raised my blood pressure a little. It just made me feel yucky! I only took it for a week (last week). Maybe that wasn't long enough for it to get in my system. I went to the doctor on Saturday and hadn't lost not 1 lb. But, then my period also started the same week. It really makes me feel so yucky that I can't exercise. All I want to do is lay down after getting home from work. Any suggestions, anyone?

posted Nov 3rd, 2008 5:12 pm


i weigh 176.7 lbs when i started phentermine 10/29/2008 it november 1st 2008 i have lost 3.7 lbs. its onld been e few days but im gona keep going

posted Nov 1st, 2008 10:09 am


Just start hope THANKS for the advise everyone!!!!!!!!!!!!!!!!!!!

posted Oct 19th, 2008 4:44 pm


I took phentermine and lost 30 pounds but got off of it because it jacked my blood pressure up to 140/110. It is a very dangerous drug and should ONLY be taken under a doctors supervision. It is an anphetamine it will result in a positive drug test so, have a perscription. I know of a DO in my town but he is just a glorified drug dealer. Also once you go off of it if you aren't tappered off you will have withdrawl symtoms.

posted Aug 28th, 2008 11:08 pm


It is widely available and very cheap in Mexico, I live in South Texas and have lost a lot of weight with it years ago. Now I have had another baby another marriage and need to start it again.

posted Aug 21st, 2008 4:14 pm


It is widely available and very cheap in Mexico, I live in South Texas and have lost a lot of weight with it years ago. Now I have had another baby another marriage and need to start it again.

posted Aug 21st, 2008 4:14 pm


Ashley i take phentermine i live in Texas and i have to drive 5hrs. to Oklahoma to get it,but it's worth it.

posted Aug 20th, 2008 5:10 pm


I have taken phentermine in the past and it worked wonders...its just VERY hard to find and all I have bought via the internet has been fake...if anyone knows where to find some please let me know...Thanks

posted Aug 10th, 2008 8:07 pm


CP, A nurse gave it to you? She can lose her license for that.

posted Jun 15th, 2008 2:33 pm


I took this a while back and combined with excersice really worked I received it from a nurse who worked through my gym. However since then the gym has closed and I was wondering if anyone knows if the prescription stuff is the same as the non prescription they offer all over the internent

posted Apr 17th, 2008 10:08 am


Where can I go the get the pills? anyone lives in San Antonio and knows a doctor? Thanks!

posted Apr 17th, 2008 8:59 am


Topamax was prescribed for migraines and seizure disorder and the pounds just MELTED off!!! I found out later than Topamax indeed is PRESCRIBED moreso than Phentermine, but Drs dont want peepz to know about it, because if you OVERTAKE any med it can hurt you, but Topamax dont hurt you EXCEPT it will slow you down mentally alert if you take it during the day. I was on 500 mg a nite and when he divided it 2 in am , 1 noon, 2 i was DOPAMAXED! so can dope you up, but ONLY if you take it WRONG!!! I have plenty left over as i dont take them as prescribed. Most people can take as little as 25 to 50 a day...

posted Apr 11th, 2008 3:19 pm


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