Cyclophosphamide (CP) substituting azathioprine after renal transplantation.

Eighteen patients received CP substituting AZ after renal transplantation following evidence of hepatitis. We have compared graft evolution before and after treatment with CP. Twelve patients showed no modification in graft evolution. In four patients the renal function decreased but it did not seem attributable to the change of the drug. Two patients showed intolerance attributable to the change of the drug. In one patient who received CP instead of AZ since the data of the transplant onwards, with no evidence of hepatic lesion, renal function decreased but this did not seem attributable to the use of the drug. The dose of CP in renal transplantation is discussed. We conclude that CP is a good substitute for AZ in renal transplanted patients. Adequate doses seemed to range between 0.7 and 1 mg/kg/day.