AP PSYCHOLOGY

Detailed explanation-1: -The major stimulant drugs are amphetamines and related compounds, methylxanthines (methylated purines), cocaine, and nicotine. Amphetamines achieve their effect by increasing the amount and activity of the neurotransmitter norepinephrine (noradrenaline) within the brain.

Detailed explanation-2: -The stimulants may be divided into three categories based on chemical structure: amphetamine (dextro-amphetamine and levo-amphetamine), methamphetamine and methylphenidate (dextro-methylphenidate and levo-methylphenidate).

Detailed explanation-3: -Elevated mood, increased alertness, increased energy, insomnia, and anorexia are all common symptoms associated with stimulant use.