Intrahepatic arterial administration of 4'epidoxorubicin (epirubicin) in advanced cancer patients. A pharmacokinetic study.

Epirubicin (epiDX) pharmacokinetics was followed in 10 advanced cancer patients with hepatic metastases from colorectal carcinoma or primary liver tumor after single bolus administration (20-40 mg) in the hepatic artery, through a surgically implanted catheter and subcutaneous access port. EpiDX plasma and whole blood concentrations follow a triphasic decay qualitatively similar to that observed after IV administration. Blood levels are consistently higher than plasma levels. Plasma clearance (nine patients, mean: 93.4 l/hr; range: 69.3-129.5 l/hr) is higher than the corresponding parameter determined in patients with hepatic metastases after intravenous therapy. The remaining patient is characterised by an abnormally low plasma clearance (13.6 l/hr), due to a hepato-pulmonary shunt. The subjects in this study were exposed to very low drug concentrations, and therefore experienced no relevant adverse side-effects.