The initial effects of nerve gas exposure depend on the dose and route of exposure. With exposure to vapor in small amounts, smooth muscles and glands of eyes, ear-nosethroat (ENT), and GI tracts and airways are mostly affected with miosis, rhinorrhea, salivation, and shortness of breath. The onset of those effects is within seconds to minutes. There is no worsening after the removal from the exposure, and no late-onset effects. After a large exposure to vapor, all symptoms of a small exposure are more prominent, and the CNS is affected. CNS symptoms range from irritability to convulsions and coma [102] . Nicotinic symptoms include weakness of skeletal muscles, fasciculations (localized in areas where droplets penetrated skin, generalized with respiratory or large transdermal exposures [102] ), and paralysis. Muscarinic symptoms include profuse exocrine secretions (tearing, rhinorrhea, salivation, bronchorrhea, and sweating), in addition to ophthalmic symptoms, such as miosis, dim vision, headache, and eye pain. Large doses may lead to seizures and coma.