Examlex
A tornado warning is issued for a region when __________.
Sedatives
Sleep-inducing drugs that tend to decrease central nervous system and behavioral activity.
Stimulants
Drugs that tend to increase central nervous system and behavioral activity.
Hallucinogens
A diverse group of drugs that have powerful effects on mental and emotional functioning, marked most prominently by distortions in sensory and perceptual experience.
Amphetamines
A class of stimulant drugs that increase energy and concentration, often used to treat ADHD but also abused for their euphoric effects.
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