Pharmacokinetics of pralidoxime chloride and its correlation to therapeutic efficacy against diisopropyl fluorophosphate intoxication in rats.

A two compartment system is used to study the therapeutic efficacy of pralidoxime chloride (1) along with a suitable pretreatment against diisopropyl fluorophosphate (2) intoxication in rats. The data were analyzed by standard techniques. Though thiamine hydrochloride pretreatment prolonged the biological half-life of 1 but it failed to increase the protective efficacy of 1, on the other hand sodium hydrogen carbonate pretreatment augmented the protective action of 1 without altering its biological half-life appreciably, through increased distribution of 1 into tissue compartment.