Nerve gas refers to a class of chemical weapons that disrupt the normal functioning of the nervous system. These toxic agents inhibit the enzyme acetylcholinesterase, leading to an accumulation of the neurotransmitter acetylcholine. This results in overstimulation of muscles, glands, and the central nervous system, causing severe symptoms and potentially death. Common types of nerve gas include sarin, VX, and tabun. They can be delivered through various means, such as aerosols or liquid forms, and are highly lethal even in small doses. Due to their devastating effects, the use of nerve gas is prohibited under international law, specifically the Chemical Weapons Convention.