A Pharmacokinetic Study of CellCept (Mycophenolate Mofetil) Versus Mycophenolate Sodium in Kidney Transplant Patients

Comparison of Pharmocokinetics of Mycophenolate Mofetil and Enteric Coated Mycophenolate Sodium in Calcineurininhibitor-free Treated Patients After Renal Transplantation

This open-label, 2-arm study will compare the pharmacokinetics of CellCept and mycophenolate sodium in kidney transplanted patients on a calcineurininhibitor-free mycophenolic acid-based therapy. On the study day patients will take their prescribed medication (either CellCept or mycophenolate sodium). Blood samples will be drawn directly before and at intervals up to 12 hours after intake of the study medication. Anticipated time on study treatment is 12 hours and target sample size is 24.

Inclusion Criteria:

• adult patients, >/=18 years of age
• kidney transplantation >/=6 months ago
• on mycophenolic acid-based, calcineurininhibitor-free therapy for >/=3 months, >/=1 month on stable dose
• co-therapy with 5mg prednisone for >/=1 month

Exclusion Criteria:

• active gastrointestinal ulcus
• severe diarrhea od gastrointestinal disease
• severe impairment of renal function
• current malignancy
• Lesch-Nyhan- or Kelley-Seegmiller-Syndrome