Pharmacokinetics of isosorbide-5-nitrate during haemodialysis and peritoneal dialysis.

The pharmacokinetics of isosorbide-5-nitrate (IS-5-N) was studied in ten patients on haemodialysis (HD) after a single oral dose of 20 mg IS-5-N, and in six patients on continuous ambulatory peritoneal dialysis (CAPD) after repeated oral doses of 3 X 20 mg IS-5-N. There was significant removal of IS-5-N from blood during HD; Cmax decreased by about 20%, AUC(0-8 h) by 30% and t1/2 by about 20% from 4.3 to 3.4 h, and plasma clearance was increased by 81 ml/min. No important loss of IS-5-N was observed in patients on CAPD.