What is the main effect of amphetamines on the body?

The main effect of amphetamines on the body is increased energy. Amphetamines are central nervous system stimulants that enhance the release of neurotransmitters such as dopamine and norepinephrine. This stimulation leads to heightened alertness, improved focus, and a boost in physical energy levels. Users often experience increased stamina and reduced fatigue, which is why amphetamines are sometimes misused for performance enhancement in various activities.

In contrast, relaxation is generally associated with depressants, not stimulants like amphetamines. Intense hallucinations and disconnection from reality are more characteristic of hallucinogens or certain other drugs, rather than the effects typically produced by amphetamines. Therefore, increased energy accurately captures the primary and most recognized impact those substances have on the body.