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What are amphetamines, and how do they affect the brain and body?

Amphetamines are stimulant drugs that speed up the brain and nervous system. They increase chemicals like dopamine and norepinephrine, which can improve alertness and energy but may also cause anxiety, heart strain, and addiction if misused or taken long-term.

Medically, amphetamines are prescribed to improve focus and wakefulness by increasing neurotransmitters in the brain. They can be effective treatments for ADHD and narcolepsy but carry risks such as dependence and cardiovascular side effects if misused.