Clinical kinetics of 1,4-dihydroxy-5,8-bis [[2- [(2-hydroxyethyl)amino ]ethyl] amino]-9,10-anthracenedione

Abstract

The clinical kinetics of 1, 4-dihydroxy-5,8-bis[[ 2-[(2-hydroxyethyl) amino] ethyl] amino]-9,10-anthracenedione dihydrochloride (DHAQ) are reported. DHAQ, 1 to 3 mg/m2, was administered as an intravenous bolus to six patients with metastatic cancer. Plasma clearance of the drug followed a biphasic pattern with a harmonic mean initial half-life (t 1/2) of 13.7 min and a terminal t 1/2 of 37.4 hr. Recovery of unchanged drug in the urine was 6.8% at 24 hr and 7.3% at 72 hr, while the corresponding recovery of total radioactivity was 9.4% and 11.3%. Apparent volume of distribution of DHAQ was about 13.8 +/- 2.9 l/kg. Total clearance was 238.7 ml/kg/hr, twice the creatinine clearance.