Enhanced oral cyclosporine absorption with water-soluble vitamin E early after liver transplantation.

We evaluated the effect of Liqui-E, a water-soluble vitamin E preparation, on cyclosporin A (CyA) whole blood concentration in liver transplant recipients, and its impact on the cost of CyA. Patients were 26 liver transplant recipients (19 adults, 7 children) who were unable to achieve and maintain therapeutic CyA whole blood concentrations with the standard recommended oral daily dose in the early post-transplant period. Liqui-E 6.25 IU/kg orally was administered with CyA every 12 hours (median time of starting Liqui-E day 14.5). With Liqui-E, the daily oral CyA requirements (mean +/- SD) were decreased in adults from 22.6 +/- 8.9 to 16.2 +/- 7.3 mg/kg/day (p < 0.001) and in children from 78.6 +/- 34.1 to 53.7 +/- 35.0 mg/kg/day (p < 0.02); intravenous administration of CyA was unnecessary. The CyA trough concentrations (mean +/- SD) before and after Liqui-E were 670 +/- 186 and 1012 +/- 216 ng/ml, respectively, in adults (p < 0.001) and 732 +/- 187 and 1052 +/- 166 ng/ml, respectively, in children (p < 0.01). When given with Liqui-E, the daily cost of CyA decreased by 26% in both adults and children. No clinical or biochemical evidence of Liqui-E toxicity was observed. Thus its administration in the early post-transplantation period can enhance CyA absorption in adults and children who are unable to achieve adequate whole blood concentrations with the usual recommended oral dosages. In addition, a significant cost saving can be realized by coadministration.