Dec 19, - For instance, diazepam is used in the treatment of intoxication of by organophosphate pesticides: ROLE OF MULTIFUNCTIONAL DRUG. Jump to Analysis of the toxic agent in biological samples - the detection of organophosphates in biological commonly used for diagnosis, and often to. Toxicol Rev. ;22(2) Diazepam in the treatment of organophosphorus ester pesticide poisoning. Marrs TC(1). Author information: (1)Food Standards.