How does phentermine work?
Phentermine is one of the class of amphetamine drugs and it is designed to affect one specific group of neurotransmitters (the chemicals that carry messages around the brain).
There are two competing explanations for how phentermine suppresses appetite. The first is that it modifies the messages from the stomach to trick people into believing that they are full. Under normal circumstances, it takes about half an hour for the stomach to signal it is full. When using this drug, the message may be sent more continuously.
Thus, people do not feel hungry and so eat less. The second explanation is that it triggers the fight-or-flight mechanism. When people experience fear, the body releases adrenaline. This gets people ready to run away or fight if the danger proves real. To make sure all the senses are available for scanning the surrounding environment, hunger is suppressed. There must be no distractions if people are to survive. |
