Evolution Slimming Ltd
Evolution Slimming Ltd
Evolution Slimming
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Home Weight Loss Weight Loss Tips Phentermine History, Benefits, Side Effects, Usage and Guides

Phentermine is a shortcut for “phenyl-tertiary-butylamine”. As per pharmacology, it is similar to amphetamine. Phentermine belongs to the class of phenethylamine and it is a psychostimulant drug.

Medically, the product is used to suppress appetite levels. It is prescribed as a diet pill. Hence, people suffering from excess fat take Phentermine as per the dosage recommended by the doctor. These pills are prescribed if there is risk to health because of obesity. The pill is meant to be used on short-term basis so that weight loss can be achieved. You should take healthy diet and should undergo physical exercises while taking the weight loss pill.


Phentermine was introduced into the market for the first time in 1959. FDA gave approval for the drug to be used for appetite suppression. During 1970s, it was available in the form of Phentermine hydrochloride. In 1998, the product was removed from the market because of report of adverse side effects. As the drug was approved by FDA, no clinical studies were conducted.

Phentermine is also marketed as fenfluarmine. It is being used as a combination drug. It was used for suppression of appetite levels and fat burning. Fenfluarmine was withdrawn from the market as it was suspected for the cause of heart valve disease. However, Phentermine is still available in the market. It is still available in various countries including US.

As Phentermine works similar to Amphetamine, it is declared as a controlled substance. As a matter of fact, amphetamine preparations are classified as Schedule II controlled substances. At the moment, Phentermine is being studied with other combination drugs to find its impact on health. The sale of Phentermine was approved by FDA in 2012.

What are the different brand names?

Phentermine was sold as Fastin from King Pharmaceuticals for SmithKline Beecham. Medeva Pharmaceuticals sells phentermine as Ionamin and Gate Pharmaceuticals sells it as Adipex-P. Phentermine is also currently sold as a generic as well.

It is available in the form of tablets, capsules and drinks as well. Phentermine   tablets or capsules are manufactured at 37.5 mg dosage. Some of the drug names are Vites, Adipex and Qsymia.

It is marketed with different trade names which are listed below:

Acxion (MX), Anoxine-AM, ,Duromine, Metermine, Mirapront, Obephen, Obermine, Obestin-30, PhenObestin 37.5, Phentermaxx, Phentrol, Phenterex, Phentromin, Pro-Fast SA, Qsymia, Razin, Redusa, Panbesy, Phentermine Trenker, Obenix, Oby-Trim, Teramine, Zantryl, Sinpet (MX), Supremin (PH), Suprenza, Umine (NZ) and Weltmine (KP).

How does it work?

Phentermine should be used for short-term to address obesity. The drug has similarity with the compound, amphetamine. In fact, amphetanime is the parent compound. Amphetamine and Phentermine are TAAR1 agonists. The hypothalamus of the brain will be affected with the intake of Phentermine. Thus, hunger levels are reduced automatically. Release of release epinephrine or adrenaline will take place so that the fat that is stored in the body will be broken. Phentermine will also release serotonin and dopamine.

You should follow the dosage as recommended by the doctor so that you will witness desired impact. The weight loss and fat reduction should take place as the drug will suppress your appetite levels. You will take less quantity of food when you are under the medication. You should avoid taking the pill after 6 pm so that you will not have any issues with sleep.


  • Decreases fat
  • Stimulates fat cells to burn fat efficiently
  • Can be used with diet and exercise for best results


  • Should be used for short-term only
  • Has potential to interact with drugs meant for diabetes, cardiac disease and high blood pressure
  • Should not be taken without prescription
  • Should not exceed the dosage

Side Effects

Phentermine side effectsThe adverse effects with the intake of Phentermine include Xerostomia (dry mouth), restlessness, nervousness, euphoria, agitation, and arrhythmia

Tachycardia, hypertension, diarrhea, vomiting, headache, rash, facial oedema, unpleasant taste, urticaria, impotence and changes in libido.

If there are any serious side effects, you should discontinue these pills and doctor should be consulted immediately.

If you feel any discomfort, it should be brought to the notice of the doctor. Serious side effects that are associated with Phentermine include stomach upset, changes in sexual desire or erectile dysfunction, tirelessness or inability to sleep, problems with thinking, unusual feelings or behaviors, euphoria, dissatisfaction, hallucinations, bad taste in the mouth. Addiction to phentermine should be brought to the notice of the doctor.

Phentermine can interact with other drugs including Isoproterenol, Dopamine, Ephedrine, Epinephrine, Norepinephrine (Levophed), Linezolid (Zyvox), Phenylephrine injection and Venlafaxine (Effexor, Effexor XR).

Caution and Advice

Phentermine should not be taken by people who are suffering from any kind of medical condition. If you are under medication, you are advised not to go for these pills without prescription.

The contraindications reported with Phentermine include hypersensitivity or idiosyncratic reaction to sympathomimetic amines, Hyperthyroidism, Glaucoma, Peptic ulcer, Prostatic hypertrophy and Epilepsy. It should not be treated with drugs which are meant to increase blood pressure. The drug should not be used with pills that are meant for cardiac disease. Pregnant ladies and lactating mothers should stay away from these drugs.

The nervous system will become very dull with the consumption of alcohol when you are under Phentermine. Hence, you should not consume alcohol. If you consume alcohol, the affects of Phentermine will be reversed.


Phentermine should be taken as per the prescription and dosage recommended by the doctor. If you are already using any other medication for weight loss, the information should be conveyed to the doctor so that you might be instructed to stay away from those drugs. You should not use medications that are likely to react with the drug. Extreme caution should be exercised by patients who are suffering from heart disease, diabetes and other kinds of diseases of serious nature.

After taking Phentermine for a long period of time, you should not stop abruptly. The dosage should be tapered so that there will not be any complications. If there are any serious issues with the intake of the drug, you should stop usage immediately and you should get medical attention.

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