Pharmacokinetics, pharmacodynamics, and tolerability of cabergoline, a prolactin-lowering drug, after administration of increasing oral doses (0.5, 1.0, and 1.5 milligrams) in healthy male volunteers
1995
Cabergoline (CAB) a long-acting dopaminergic ergoline derivative, was given orally, in single doses of 0.5, 1.0, and 1.5 mg, to 12 healthy men in order to evaluate its PRL-lowering effect as well as its plasma pharmacokinetics and urinary excretion. Drug administrations were separated by 5-week washout periods. Blood samples for PRL and CAB determination were taken at baseline and for 840 h thereafter (every 1 h up to 4 h, every 4 h up to 12 h, every 24 h up to 168 h, and weekly up to 5 weeks). Fractional urine collections for CAB excretion were taken immediately before drug administration, every 4 h up to 12 h, and every 12 h up to 168 h. During the study period, blood pressure and heart rate were monitored at the same time periods of plasma sampling for CAB, and electrocardiographic tracings and hematological evaluations were performed before and after each treatment period. All CAB doses (0.5, 1.0, and 1.5 mg) produced in all subjects a complete PRL suppression (PRL < 1.0 micrograms/L), that occurred e...
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