Which category of drugs includes amphetamines and cocaine?

The category of drugs that includes amphetamines and cocaine is stimulants. Stimulants are substances that increase activity in the brain and central nervous system, leading to heightened alertness, attention, and energy levels. Both amphetamines and cocaine work by increasing the levels of dopamine and norepinephrine in the brain, which enhances mood and focus. This classification is significant as it helps in understanding their effects and potential for abuse, as well as their therapeutic uses in conditions like attention deficit hyperactivity disorder (ADHD) and narcolepsy.

Depressants, on the other hand, are known to slow down brain function and can lead to sedation, relaxation, and decreased anxiety. Psychedelics are substances that alter perception, mood, and cognitive processes, primarily affecting serotonin receptors. Analgesics are used to relieve pain and do not fit into the stimulant category, as they primarily act to reduce discomfort rather than increase energy or alertness.