, Volume 38, Issue 1, pp 67-69

Effect of haemodialysis on the pharmacokinetics of cetirizine

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Summary

The pharmacokinetics of Cetirizine, a histamine H1-receptor antagonist, were investigated in five renal failure patients undergoing chronic haemodialysis therapy. The patients received one 10 mg cetirizine dihydrochloride capsule 3 h before haemodialysis.

Concentrations of cetirizine in serum and dialysate were determined by HPLC. The maximum serum cetirizine concentration and the time to reach that maximum were 285 μg·1−1 and 2.0 h, respectively. The terminal disposition half-life of cetirizine in these patients was 19.3 h.

The haemodialysis clearance of cetirizine was 14.0 ml · min−1. Although this is approximately 33% of the apparent total body clearance of cetirizine in subjects with normal renal function, the fraction of the dose removed by dialysis was only 9.4%. Thus, since haemodialysis does not produce a clinically significantly alteration in cetirizine elimination, no supplemental dose should be necessary after dialysis.