Summary
Phentermine is a prescription appetite suppressant. It is one of the two ingredients in Fen-phen.
Description
Phentermine comes as either a quick-acting drug (Adipex) or a time-release drug (Ionamin or Duromine). It is generally only prescribed to people who are morbidly obese and thus are have health risks because of their weight.
Phentermine affects the neurotransmitters in your brain, causing stimulation which your brain responds to by turning off the hunger sensation.
Generally, patients only receive Phentermine for up to 12 weeks. Longer term use is not encouraged due to the issues of a tolerance reaction. Phentermine may become less effective over time, thus it's best not to use it for too long.
History
Phentermine was one of the two drugs in the infamous Fen-phen (which was withdrawn from the US market after it was linked to heart-related illnesses and deaths). But, it was Fenfluramine that was the problem with Fen-phen. So, Phentermine is still available.
Criticism
Phentermine acts like an amphetamine and thus can be addictive. Because of this, it is a controlled substance.
Phentermine is linked to insomnia and may cause blood pressure and heart rate to increase. Essentially, it's a stimulant and has all the side-effects (both negative and positive) of one.
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