Systems and methods for treating nerve agent exposure in a person are disclosed. Specifically, systems and methods for detecting with sensor(s) the presence of a nerve gas in the vicinity of a person and/or symptoms in a person as a result of exposure to nerve gas, followed by actuation of an alarm and automatic initiation of a programmed injection sequence comprising at least one injection of a nerve gas antidote comprising at least one of atropine, an anticholinesterase reactivator such as 2-PAM and an anti-convulsant such as diazepam.