What classification of drugs accelerates the central nervous system?

Stimulants are classified as drugs that speed up the functioning of the central nervous system. They increase alertness, attention, and energy by elevating heart rate and blood pressure, and they can enhance the release and efficiency of neurotransmitters in the brain. This class of drugs includes substances like amphetamines and cocaine, which can lead to increased levels of activity and an overall state of heightened arousal.

In contrast, depressants are substances that slow down brain activity, providing a calming effect. Narcotics primarily serve to relieve pain and can induce feelings of euphoria, but they do not enhance central nervous system activity. Hallucinogens, while they alter perception and can cause hallucinations, do not primarily function to stimulate the central nervous system like stimulants do.