Atropine is NOT an “Antidote” to a nerve-gas attack. It is, at best, a mitigation agent. And having a vial handy still require one to fill a syringe and inject.
Anyone who has served in the last 30 or so years know about Atropine auto-injectors (and 2-Pam-chloride autoinjectors).
And you will survive after atropine and 2-pam injections, but you’ll also spend several weeks in the hospital, recovering. . .