title: Pharmacokinetic properties of testosterone propionate in normal men.
abstract: The pharmacokinetic characteristics of testosterone propionate were studied in normal men after a single im dose of 25 mg testosterone propionate-19,19,19-d3. Plasma levels of testosterone propionate-19,19,19-d3, its active metabolite testosterone-19,19,19-d3, and endogenous testosterone were measured by gas chromatography-mass spectrometry. Testosterone propionate-19,19,19-d3 was gradually transferred from the im injection site to the systemic circulation. The plasma levels of testosterone propionate-19,19,19-d3 were maintained at 2-4 ng/ml between 3 and 36 h after administration. Plasma testosterone-19,19,19-d3 levels were maintained above the physiological testosterone level for 48 h, while plasma levels of endogenous testosterone changed little.
mesh_terms: D000328:Adult; D003903:Deuterium; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D007700:Kinetics; D008297:Male; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone; D003903:Deuterium