Dược Động Học :
▧ Absorption :
Readily absorbed from the GI tract. Peak plasma concentrations occur within 2-4 hours and the onset of action occurs within one hour. The maximal effect of chlorpropamide is seen 3-6 hours following oral administration.
▧ Protein binding :
Highly bound to plasma proteins.
▧ Metabolism :
Up to 80% of dose is metabolized likely through the liver to to 2-hydroxylchlorpropamide (2-OH CPA), p-chlorobenzenesulfonylurea (CBSU), 3-hydroxylchlorpropamide (3-OH CPA), and p-chlorobenzenesulfonamide (CBSA); CBSA may be produced by decomposition in urine. It is unknown whether chlorpropamide metabolites exert hypoglycemic effects.
▧ Route of Elimination :
80-90% of a single oral dose is excreted in the urine as unchaged drug and metabolites within 96 hours.
▧ Half Life :
Approximately 36 hours with interindividual variation ranging from 25-60 hours. Duration of effect persists for at least 24 hours.