Reminyl and Razadyne are the names of a drug that's given to Alzheimer patients to help slow brain damage.
Researchers experimenting with animals found that the drug completely protected guinea pigs against high doses of the nerve agents soman and sarin, as well as toxic amounts of pesticides.
Alheimer's drug a 'poison antidote'.
Writing in the Proceedings of the National Academy of Sciences, Dr Albuquerque and colleagues at the US Army Medical Research Institute of Chemical Defence and the Army Medical Research and Materiel Command, both in Maryland, said their research could benefit farm workers and soldiers.
This simple and safe antidotal therapy could be added to the arsenal of medications carried by all military members and first responders, who could easily administer it to themselves should they suspect that they've been exposed to a nerve agent," Dr Albuquerque said.
"I think maybe we have something that can protect us against bad terrorists," he said in a telephone interview, adding that the next step was to test female guinea pigs.