Study of Therapeutic Monitoring of Mycophenolate Mofetil (MMF/CellCept) After Kidney Transplantation

Depending on body surface area and age, MMF may be given in capsule, tablet, oral suspension, or IV form. The initial dose will be at least 1 gram BID in adults and 600 mg/m\^2 in pediatrics. In Groups A and B, subsequent doses will be adjusted to maintain blood MPA levels ≥1.3 μg/mL with cyclosporine or ≥1.9 μg/mL with tacrolimus. In Group C, subsequent doses are not to be adjusted, except in the case of unacceptable toxicity.

Cyclosporine will be given as 100-mg soft gelatin capsules and dosed to maintain either reduced (Group A) or standard/full (Groups B and C) blood concentrations. Cyclosporine target concentrations are as follows: Days 1-30, 250-325 ng/mL; Days 30-90, 125-165 ng/mL (reduced) or 250-270 ng/mL (full); Days 90 through end of study, 95-145 ng/mL (reduced) or 190-220 ng/mL (full).

Tacrolimus will be given as 1-mg and 5-mg capsules and dosed to maintain either reduced (Group A) or standard/full (Groups B and C) blood concentrations. Tacrolimus target concentrations are as follows: Days 1-30, 8-12 ng/mL; Days 30-90, 4-6 ng/mL (reduced), 8-10 ng/mL (full); Days 90 through end of study, 3-5 ng/mL (reduced), 6-8 ng/mL (full).