Chlordiazepoxide metabolism as related to the reduction in the aggressive behaviour of cynomolgus primates.
1971
1. Blood levels and tissue distribution of chlordiazepoxide and its major metabolites have been correlated with observed changes in ‘aggression” and ‘activity” following oral administration of the compound to cynomolgus (Macaca fascicularis) primates.2. Distribution of 14C after a single oral dose of [2-14C] chlordiazepoxide (5 mg/kg) is indicative of rapid absorption, approximately 30% and 80% dose being absorbed by 0.25 h and 2 h respectively. Highest blood concentrations are observed 2-6 h after dosing. The relatively high content of 14C in the tissues and the corresponding low content in urine and faeces at 2-12 h after dosing are suggestive of tissue storage and/or enterohepatic recirculation.3. Analysis of blood, brain and muscle for chlordiazepoxide and its major metabolites indicate that these are present 0.25 h after dosing. Chlordiazepoxide and its N-desmethylated derivative reach peak concentrations in all three tissues 2 h after dosing while the peak for ‘lactam” is attained at 6 h. In all 3 t...
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