The influence of diuretics on the excretion and metabolism of doping agents. III. Etilamfetamine.
The urinary excretion of etilamfetamine (ethylamphetamine) and its major metabolite amphetamine in humans was followed over a period of several days after the oral administration of two formulations. The excretion of both substances was affected by urinary pH. Excretion peaks were observed 3-4 h after the ingestion of etilamfetamine in a capsule and the proportion of etilamfetamine excreted during 72 h was 22.2 to 54.4%. Excepting a shift in the peak excretion time to 4-5 h, no meaningful pharmacokinetic differences were found when Apetinil-Depot, a retard formulation, was administered. The intake of acetozolamide shortly after etilamfetamine resulted in a decrease of the etilamfetamine excretion during one day and a suppression below the detection limit for periods varying from 2-7 h post-dosing. Although the etilamfetamine excretion was suppressed from 2 to at least 10 h post-dosing, the action of the diuretic clofenamide on the etilamfetamine excretion is generally not so obvious as that of acetazolamide. The administration of furosemide only reduced the etilamfetamine concentrations by a factor of 4 to 5 during a 2-h period.
D000086:Acetazolamide / Q000494:pharmacology; D000661:Amphetamine / Q000652:urine; D000662:Amphetamines / Q000652:urine*; D004232:Diuretics / Q000494:pharmacology*; D004300:Doping in Sports; D005665:Furosemide / Q000494:pharmacology; D006207:Half-Life; D006801:Humans; D006863:Hydrogen-Ion Concentration
D000662:Amphetamines; D004232:Diuretics; C016434:ethylamphetamine; D005665:Furosemide; D000661:Amphetamine; D000086:Acetazolamide