CNS depressants primarily function by enhancing the activity of the neurotransmitter GABA. This neurotransmitter inhibits the transmission of nerve signals in the brain, leading to a decrease in brain activity. The result is a sedative effect, which can induce relaxation, reduce anxiety, and promote sleep. The specific mechanism of action may vary slightly between different types of depressants, but the overall effect is to depress CNS activity.
