Which of the following is NOT one of the CNS depressants?

Cocaine is classified as a stimulant, not a CNS depressant. CNS depressants are substances that reduce the activity of the central nervous system, leading to sedation, relaxation, and decreased inhibition. Barbiturates, anti-anxiety tranquilizers, and anti-psychotics all have CNS depressant effects.

Barbiturates are well-known for their ability to depress the central nervous system, often used historically as sedatives or sleep aids. Anti-anxiety tranquilizers, such as benzodiazepines, also work by producing calming effects, reducing anxiety, and promoting sleep. Anti-psychotic medications can have sedative properties, especially those that influence neurotransmitters related to anxiety and mood.

In contrast, cocaine increases alertness, energy, and cognitive function by stimulating the release of dopamine and other neurotransmitters, which causes a completely different effect on the central nervous system compared to depressants. Understanding these classifications helps in recognizing the physiological effects of different substances on the body.