Phentermine
Phentermine is in a class of drugs called anorectics which decrease appetite by possibly changing brain levels of serotonin. Phentermine is a nervous system stimulator like the amphetamines, causing stimulation, elevation of blood pressure, and faster heart rates.
Phentermine, like many other prescription drugs, work with neurotransmitters in brain. It stimulates 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 energy expenditure, and increases fat storage.
Phentermine diet pills should not be taken by patients with glaucoma, hyperthyroidism, or a history of drug abuse or psychotic illnesses. Phentermine is not recommended in patients with high blood pressure that is not well controlled.
Patients on phentermine should have their blood pressure closely followed.
Insulin requirements may change in patients on phentermine; alcohol can cause a drug interaction. Abrupt stoppage of the diet pills can cause withdrawal with fatigue and depression. Phentermine is potentially addicting. Phentermine is not recommended for patients with symptomatic heart disease including rhythm problems.
Phentermine