Ethanol is a simple organic compound and a psychoactive substance that acts as a central nervous system (CNS) depressant. Biologically, its effects involve modulating neurotransmitter systems, primarily enhancing the inhibitory action of gamma-aminobutyric acid (GABA) while simultaneously impairing excitatory neurotransmission. Metabolism of the compound occurs mainly in the liver, following a two-step process involving the reduction of ethanol to acetaldehyde, and subsequently converting acetaldehyde to acetate. The resulting metabolic byproducts can contribute to physiological distress, and repeated exposure can lead to systemic toxic effects affecting the brain, gastrointestinal tract, and liver.