Phentermine is an appetite suppressant used for the short-term treatment of obesity. When used in conjunction with diet, exercise, and behavior therapy, Phentermine may help you to lose weight while you are learning new ways to eat and to exercise.

It is best to use this drug under a doctor’s care. The average dose is 30mgs/day. If you are a new user, buy a low number of pills as a test, and start with the lowest dosage.

Phentermine is approved for the short-term treatment (6-12 weeks) of obesity. To continue losing weight and prevent its return, you must develop and continue on a long-term basis - good dietary, exercise, and behavioral habits.

Few studies have been conducted concerning the long-term use of Phentermine. The National Institute of Health (NIH) has conducted a comparison of long-term studies of diet medications.

Currently, no clinical study is available that measures the length of time that Phentermine will stay in your body after you stop treatment.

Phentermine is prescribed for short term treatment of obesity; therefore there are no clinical findings of the long term effects of this drug.

Phentermine Hydrochloride.

No, the only active ingredient is Phentermine Hydrochloride. Ephedra is a completely different chemical substance.

Blurred vision, dry mouth, sleeplessness, irritability, stomach upset or constipation may occur the first few days as your body adjusts to the medication. The main advantage of phentermine is that it suppresses the appetite; however, the drug also elevates the heart rate and blood pressure.

This really depends on your medical history, and how your body reacts to the different medications mentioned, and if the medication is most suited to your needs. Phentermine should NOT be taken if you have any of the following conditions: heart disease, high blood pressure, glaucoma, thyroid problems, anxiety disorder, diabetes, epilepsy or any other seizure disorder. Do not take Phentermine if you are taking monoamine oxidase inhibitors (MAOI) to treat depression. Also, if you are pregnant or nursing, talk to your doctor about the potential risks involved with taking Phentermine.

The success of Phentermine as a weight loss drug is probably due to the fact that it is one of the oldest FDA approved weight loss drugs in the market, and because it is cheaper than other diet pills. Phentermine pills’ advantages are seen mostly among those who suffer from severe obesity. This medication is administered primarily to those who have followed healthy eating and exercise regimens, yet cannot get to a healthy weight. This pill can be the answer for these people.

Another one of Phentermine pill advantages is that it is now available online. Ordering online is secure, confidential, and quick.

Taking Phentermine, along with eating and exercising sensibly, can be the answer for those who suffer from obesity.

Phentermine is recommended for people that have a body mass index (BMI) of 28 or more. It is only intended for those with major weight problems.

The yellow phentermine 30mg capsules and the blue Phentermine 30 mg capsules act the same. Blue Phentermine and Yellow Phentermine both have the same active ingredient (i.e. Phentermine Hydrochloride).

Both of these capsules are manufactured by Eon Labs. The blue/white version is a generic for Fastin and the yellow is just a generic phentermine. The ingredients are the same. The only real differences are the aspect (color and powder vs. little pellets) and the price.

Please note that the yellow capsules are not a generic equivalent for Ionamin. There is no generic equivalent for Ionamin, which is the time released resin form of Phentermine.

As for the 15 mg capsules, they are simply a lower dosage form of Phentermine that is manufactured by Eon Labs.

The 37.5 mg Phentermine is a generic for Adipex-P that is manufactured by Purepac. The only difference between the brand name (Adipex-P, manufactured by Gate Pharma) and the generic is price.

For a more technical explanation, please contact the manufacturers Eon Labs and Purepac.

Fastin® was the brand name of Phentermine produced by King Pharmaceuticals for SmithKline Beecham. In December 1998, SK-Beecham withdrew Fastin® from the market. Since Fastin® is no longer produced and sold, it is not included in our Pictures of Phentermine section.

Adipex® is the brand name of Phentermine produced by Gate Pharmaceuticals.

Ionamin® is the brand name of Phentermine marketed by Medeva Pharmaceuticals. Ionamin® capsules use a special delivery system, known as resin matrix, to deliver Phentermine. Although there are other Phentermine products on the market, none has this resin matrix.

Ionamin is the timed-release resin form of Phentermine and Adipex is the brand name for Phentermine Hydrochloride. Ionamin’s timed-release form means that this tablet lasts longer, but with a milder effect, while Adipex is said to last 10-12 hours. However, the differences between these two are subjective.

No official clinical study has been conducted on the use of Phentermine in conjunction with Xenical. Prior to taking any prescription medicine, please inform your doctor or healthcare professional of your complete medical history, including any other medicines you may be taking (both prescription and non-prescription). Based on your medical history and any medications you are currently taking, your doctor will determine if you may safely take Phentermine and Xenical.

"Phen-Pro" is the combination (cocktail) of Phentermine (the "Phen") and a low dosage of Prozac (the "Pro"). Any one of the following antidepressants: Zoloft, Celexa, Luvox, Trazadone or Effexor may be used in lieu of Prozac.

The use of the antidepressant in the Phen-Pro cocktail is unrelated to depression. The cocktail is necessary because the effects of Phentermine, when used alone, lessen over time. The Phen-Pro cocktail enables Phentermine to work better and for a longer period of time.

Phen-Pro is considered an "off-label" use, meaning that the FDA, who often voice concerns regarding the mixing/combining of medications, does not approve it. However, once the agency has approved a drug, doctors may prescribe it at will.

The combination of Phentermine and Prozac does not appear to cause the problems that resulted from the usage of Fen-Phen.

No, Phentermine is not an Amphetamine. Phentermine is, however, similar chemically to the Amphetamines. In the diagram below, we have reproduced the molecular structures of Phentermine, Methamphetamine and Amphetamine.

The three molecules are chemically similar, but are not identical.

As Phentermine is similar chemically to Amphetamines, it may cause a positive result in urine screening tests for Amphetamines.

Fen-Phen is the combination of Fenfluramine or Pondimin (the "Fen") and Phentermine (the "Phen"). Fenfluramine and Phentermine are prescription medications used as appetite suppressants for the short-term (a few weeks) management of obesity.

Phentermine received FDA approval in 1959 and Fenfluramine in 1973. Together, the two medications produced a powerful diet drug. The FDA had never approved the Fen-Phen combination, but once the agency has approved a drug, doctors may prescribe it at will.

Phentermine has also been used in combination with Dexfenfluramine ("Dexfen-Phen"). Dexfenfluramine (or Redux) was approved in 1996 for use as an appetite suppressant in the management of obesity.

In 1992, Dr. Michael Weintraub of the University of Rochester and several colleagues published a study showing Fen-Phen as far more effective than dieting or exercise in reducing the weight of the chronically obese. Initially, Fen-Phen seemed to be without immediate side effects.

Soon, Fen-Phen was on the market. In just a short time, Fen-Phen became a national sensation, with 6.6 million prescriptions in 1996.

Dexfen-Phen - The combination of Redux or Dexfenfluramine - a more refined compound that, like Fen-Phen, affects seratonin levels, but with fewer side effects than Fenfluramine - and Phentermine also became a sensation.

Unfortunately, neither combination was tested for safety... By the summer of 1997, the Food and Drug Administration (FDA) found 24 cases of heart-valve deterioration in women who had taken the Fen-Phen combination. Throughout the summer, the FDA received additional reports of heart disease, including reports from patients who had taken only Fenfluramine or Dexfenfluramine.

In September 1997, The FDA requested drug manufacturers to voluntarily withdraw Fenfluramine and Dexfenfluramine. The FDA also recommended that patients using either Fenfluramine or Dexfenfluramine stop doing so. To read the FDA statement regarding the withdrawals, please click here.

The FDA did NOT, however, request the withdrawal of the third drug involved in the cocktails, Phentermine.

Prior to beginning any prescription medicine, you should inform your doctor of your complete medical history, including medical problems and any other medications that you are taking (both prescription and non-prescription).

Yes, Phentermine (and other prescription medications) may be ordered online from Phentermine-Rx.com.

The U.S FDA (Food and Drug Administration) cannot guarantee the origin and the quality of medications produced and sold outside U.S. borders, therefore, they do not recommend ordering medications online from pharmacies located outside the U.S. In support of the FDA, we cannot recommend that you purchase medications for U.S. shipment from overseas pharmacies.

The online pharmacy providing the service to Phentermine.com is based in the USA and works for a U.S.-based audience. Therefore, they CANNOT and DO NOT accept international orders for prescription medications. For your safety, we cannot safely recommend a non-U.S. based online pharmacy from where you may purchase Phentermine (or other medications). We can only recommend that you familiarize yourself with your country’s regulations regarding the importation of medications for personal use.

The brand names for Phentermine are Ionamin ® and Adipex-P ®. Didrex ® is the brand name for benzphetamine, which is the strongest weight loss medication (out of all the weight loss medications mentioned, it is said to be the closest to amphetamine, with a possible greater abuse potential).

A generic drug is one which is identified by its official chemical name rather than an advertised brand name. The term has also come to mean a drug that has been introduced onto the market, usually after the patent on the brand-name drug has expired, through an approval process known as an Abbreviated New Drug Application (ANDA). Generics available in the U.S. have the same active chemical composition and have been demonstrated bioequivalent, i.e., deemed by the Food and & Drug Administration (FDA) to produce the same effect on the body as their brand-name counterparts.

The following frequently asked questions and answers will help you better understand the benefits of generic drugs.

The active ingredients in the brand-name and generic products are the same. Both the brand-name and the generic versions must have the same potency, be available in the same dosage forms (i.e. tablet, liquid, injectable), be demonstrated safe and effective, and be manufactured under government-approved Good Manufacturing Practices (GMP). Significant differences in any of these areas would mean the generic drug would not be approved by the FDA, and therefore would not be available. Although the inactive ingredients such as fillers and dyes are allowed to be different, these ingredients should not affect the safety or efficacy of a drug in any way. In fact, brand-name as well as generic companies often change these inactive ingredients...with FDA approval, of course.

A generic is considered as safe as its brand-name alternative. No drug is allowed on the market unless it is proven to the satisfaction of the FDA that it meets the standards for safety, efficacy and proper manufacturing processes. In terms of drugs extensively used by children, three of the most commonly prescribed drugs in the U.S. are generic antibiotics: amoxicillin, erythromycin and penicillin VK. A similar situation exists with drugs commonly used by the elderly. Ibuprofen and hydrochlorothiazide are among the most widely-used generics; both are used to treat adult and elderly disorders such as arthritis and high blood pressure.

Yes. It is the job of the FDA to inspect both brand-name and generic pharmaceutical manufacturers. The same rules of inspection apply to both. You can be assured that generic products available on the U.S. market today have undergone, and continue to undergo, strict review.

No. Generally, when brand-name drugs are first introduced, they are patent-protected for 17 years. During this time, only that one brand of drug is allowed on the market, unless the manufacturer decides to allow others. When the patent expires, other drug companies can then introduce competitive generic versions of the brand-name product, but only after they have been thoroughly tested and approved by the FDA through the process.

On average, most generics are about half the price of the brand-name drug; some generics may cost up to two-thirds less than the brand-name version. There are several reasons why generic pharmaceuticals are almost always much less expensive than their brand-name counterparts. First, there is much less money spent advertising, promoting, marketing, researching and developing the generic version of a drug. Second, the profit margins of generic drugs are considerably less than those of their brand-name equivalents. Third, because there are usually several providers of a given generic, competitive pricing often occurs among different generic versions of the same brand-name product.

It should also be pointed out that the initial cost to develop a new drug is extremely high. It might take years for a company to recoup its research and development expenses. Thus, although a patent is issued to protect the investment, the research and development costs are sometimes included even though the patent has expired.