Alcohol works as a central nervous system depressant by:

Alcohol works as a central nervous system depressant by binding to neuron receptors.
Alcohol can affect badly on many parts of the brain, it can contracts brain tissues and destroys brain cells, it also depresses the central nervous system, so Alcohol is bad for health but instead of this people drink Alcohol a lot and when a person drink alcohol in excess amount over a prolonged period of time that can cause serious problems with cognition and memory.