Analytical procedures for the determination of naltrexone and metabolites have been presented. The basic procedure involves the use of radiolabeled drugs and thin layer chromatography. Naltrexone, 6 beta-naltrexol and 2-hydroxy-3-O-methyl-6 beta-naltrexol were found by both the TLC procedure and combined gas chromatography-mass spectrometry. The presence of 3-O-methyl-6 beta-naltrexol was indicated by the TLC method, but this metabolite could not be found by mass spectrometry.
Body Fluids Chromatography, Thin Layer