Amphetamines are rarely prescribed except by hospital physicians in a few specific types of disease. Amphetamines are, however, commonplace as a drug of abuse. Uppers, speed and reds are examples of the varying forms of amphetamines. Derivatives of amphetamines were popularly prescribed as diet pills. Unwise physicians may continue to do this but they lead their patients into risky territory.

Amphetamines act by stimulating adrenaline receptors, thereby exciting and keeping the user awake. These are exceptionally dangerous drugs. Their direct effect on the adrenal system can lead to heart attacks, strokes and burst blood vessels due to increased blood pressure. The body does not remove these artificial stimulants easily and dependency can occur quite quickly.