Absorption and excretion of pralidoxime in man after intramuscular injection of PAM-2CL and various cholinolytics

Summary A dose of 1.0 g (10.0–14.0 mg/kg body weight) of pralidoxime mixed with various cholinolytics was given by i.m. injection to 29 healthy male subjects. A concentration of pralidoxime in blood of 4 µg/ml was reached after 5 to 10 min with all the mixtures and was maintained for about 1 to 2 h. The calculated half lives of pralidoxime in three groups of subjects were 62.2, 60.0 and 61.8 min., respectively. — The urinary excretions of pralidoxime during the first 4 h after the injections averaged 75.0, 79.6 and 69.6 per cent, respectively, of the total amount given. — The results are compared with published information about similar oximes.