This link has been bookmarked by 9 people . It was first bookmarked on 27 May 2008, by john.
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08 Feb 12
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16 Sep 11
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Phentermine, a contraction of "phenyl-tertiary-butylamine", is an appetite suppressant of the phenethylamine class. It is an amphetamine like stimulant.
It is approved as an appetite suppressant to help reduce weight in obese patients when used short-term and combined with exercise, diet, and behavioral modification. It is typically prescribed for individuals who are at increased medical risk because of their weight and works by helping to release certain chemicals in the brain that control appetite.
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Generally, phentermine appears to be relatively well tolerated.[2] It can produce side effects consistent with its catecholamine-releasing properties, e.g., tachycardia (increased heart rate) and elevated blood pressure, but the incidence and magnitude of these appear to be less than with the amphetamines. Because phentermine acts through sympathomimetic pathways, the drug may increase blood pressure and heart rate. It may also cause palpitations, restlessness, and insomnia. Additionally, phentermine has the potential to cause psychological dependence. After short term use, tolerance begins and can be followed by rebound weight gain.
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Phentermine works on the hypothalamus portion of the brain to stimulate the adrenal glands to release norepinephrine, a neurotransmitter or chemical messenger that signals a fight-or-flight response, reducing hunger. Phentermine works outside the brain as well to release epinephrine or adrenaline causing fat cells to break down stored fat, but the principal basis of efficacy is hunger-reduction. At clinically relevant doses, phentermine also releases serotonin and dopamine, but to a much lesser extent than that of norepinephrine.[4]
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Generally, it is recommended by the Food and Drug Administration (FDA) that phentermine should be used short-term (usually interpreted as 'up to 12 weeks'), while following nonpharmacological approaches to weight loss such as healthy dieting and exercise.[5]
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In 1997 after 24 cases of heart valve disease in Fen-Phen users, fenfluramine and dexfenfluramine were voluntarily taken off the market at the request of the FDA. Studies later proved that nearly 30% of people taking fenfluramine or dexfenfluramine had abnormal valve findings. The FDA did not ask manufacturers to remove phentermine from the market.
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Phentermine is still available by itself in most countries, including the U.S. However, because it is similar to amphetamines, it is classified as a controlled substance in many countries (including Australia). Internationally, phentermine is a schedule IV drug under the Convention on Psychotropic Substances.[6] In the United States, it is classified as a Schedule IV controlled substance under the Controlled Substances Act.
Phentermine is being studied with other medication for obesity. The experimental appetite suppressant drug Qnexa is a mixture of Phentermine and Topiramate. The FDA’s Endocrinologic and Metabolic Drugs Advisory Committee reviewed Qnexa on July 15, 2010. The committee voted narrowly against recommending approval.[7]
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18 Mar 11
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27 May 08
johnhttp://en.wikipedia.org/wiki/Phentermine explains phentermine dite pill quite understandable information for public.
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