Methamphetamine releases high levels of the neurotransmitter dopamine, which stimulates brain cells, enhancing mood and body movement. It also appears to have a neurotoxic effect, damaging brain cells that contain dopamine
and serotonin, another neurotransmitter. Over time, Methamphetamine appears to cause reduced levels of dopamine, which can result in symptoms like those of Parkinson’s Disease, a severe movement disorder.
Meth causes increased heart rate and blood pressure and can cause irreversible damage to blood vessels in the brain, which can cause strokes. Other effects of Meth include respiratory problems, irregular heartbeat and extreme
anorexia.