title: Absorption of triazolam from pelleted drug-diet mixtures by the mouse: quantitation of alpha-hydroxytriazolam in urine.
abstract: The absorption of triazolam from pelleted drug-diet mixtures by mice under steady-state conditions was determined for doses up to 150 mg/kg/day by measuring alpha-hydroxytriazolam, the principal urinary metabolite of triazolam in the mouse, in urine samples collected over a 24-hour period. Following beta-glucuronide glucuronosohydrolase hydrolysis of the urine, quantitation of alpha-hydroxytriazolam was accomplished using a specific reverse-phase liquid chromatographic method which utilized UV detection at 214 nm. Assay precision was greater than 2.7% (CV) over the concentration range of interest. Statistical analysis of the excretion data indicated that the mathematical relationship between the triazolam dose and the quantity of alpha-hydroxytriazolam excreted was linear for female mice and nonlinear for male mice. Triazolam absorption, as reflected by alpha-hydroxytriazolam urinary excretion data, increased with triazolam dose.
mesh_terms: D000818:Animals; D014151:Anti-Anxiety Agents / Q000378:metabolism* / Q000652:urine*; D004032:Diet; D005260:Female; D006868:Hydrolysis; D007408:Intestinal Absorption; D008297:Male; D013058:Mass Spectrometry; D051379:Mice; D008815:Mice, Inbred Strains; D014229:Triazolam / Q000031:analogs & derivatives / Q000378:metabolism* / Q000652:urine*
chemical_list: D014151:Anti-Anxiety Agents; D014229:Triazolam; C028638:alpha-hydroxytriazolam