Phentermine, like many other prescription drugs, works with chemicals called neurotransmitters in your brain. It actually stimulates your neuron bundles to release a particular group of neurotransmitters known as catecholamines, these include dopamine, epinephrine (formally known as adrenalin), and norepinephrine (noradrenalin). They signal a fight or flight response in your body which, in turn, puts a halt to the hunger signal. As a result, you lose your appetite because your brain doesn’t receive the hunger message. This is perhaps due to phentermine’s affects on leptin levels in the brain. It is theorized that phentermine can raise levels of leptin which signal satiety. It is also theorized that increased levels of the catecholamines are partially responsible for halting another chemical messenger know as neuropeptide Y. This chemical initiates eating, decreases.

Even when phentermine pills are taken along with a diet plan, there are side effects, such as dry mouth, insomnia, irritability, stomach upset or constipation until the body adjusts to the medication. These might disappear in time but it’s good practice to inform the physician if they persist for long.

Diet, smoking, sleeping and alcohol habits need to be changed for the medicine to take effect as well as preventing side effects which could lead to severe complications.

Before taking phentermine pills as part of diet consult your physician to discuss medical history as well as details and history of existing diseases and medications-even cold medicine.

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