Pharmacology: Pharmacokinetics: Carvedilol is well absorbed from the gastro-intestinal tract but is subject to considerable first pass metabolism in the liver; the absolute bioavailability is about 25%. Peak plasma concentrations occur 1 to 2 hours after administration. It has high lipid solubility. Carvedilol is more than 98% bound to plasma proteins. It is extensively metabolized in the liver, the metabolites being excreted mainly in the bile. The elimination half-life is about 6 to 10 hours. Carvedilol has been shown to accumulate in breast milk in animals.