In the course of the last 50 years tabun was not considered a perspective chemical warfare agent because of its inconvenient physico-chemical properties in the European area.. The possible use of this compound in other regions arose the question of medical treatment after tabun intoxication. The existing reactivators for organophosphate-inhibited acetylcholine esterase used in the armies of developed countries are not sufficiently effective. The reason of this is defined in the article and a solution of this problem suggested.