Alcohol is one of the most commonly used drugs appearing in many forms.
As alcohol enters your body and finds a way into the brain, it interacts with your neurons, or brain cells. Excitatory neurons use the neurotransmitter glutamate and inhibitory neurons use the neurotransmitter gaba. These 2 messengers have contrasting roles: glutamate sends a signal of excitation while gaba inhibits this message but organizes and differentiates the information. So how does alcohol affect this? Well, it stifles glutamate transmission and enhances gaba transmission. That means that you get less excitation and more inhibition. Since the glutamate transmission is low, information flow becomes slower and only the largest messages can pass through. This means that you feel less, notice less, perceive less, and remember less. With alcohol, you think little about something but more clearly. Thinking clearly about nothing much.
Sources used: https://www.youtube.com/watch?v=vkpz7xFTWJo