Pharmacokinetic studies on Ro 15-1788, a benzodiazepine receptor ligand, in the brain of the rat.

Methods for determining Ro 15-1788 in brain tissue were developed using gas chromatography with nitrogen-phosphorus detection, and using reverse-phase high performance liquid chromatography. Application of the methods to pharmacokinetic studies in the rat found the elimination half-life of Ro 15-1788 from rat brain to be 16 min. Ro 15-1788 was undetectable in rat plasma at the time points studied. Concentrations of Ro 15-1788 in the brain were reduced if chlordiazepoxide was coadministered.