Tac, Mini-MTX, MMF Versus Tac, MTX for GVHD Prevention

Tacrolimus 0.03 mg/kg/day beginning day -1 or tacrolimus 0.03mg/kg/dose BID orally beginning on day -3. If Tac is administered intravenously, it will be given over 24 hours and will be converted to oral administration 2 times a day when the patient has engrafted and/or can tolerate oral medication. Levels of Tac will be obtained to maintain a recommended target serum level of 5-12 ng/mL

MTX 15mg/m2 IV on day +1, followed by 10mg/m2 on day +3, +6, +11. If patient \< 10 kg then MTX will be given at 0.5 mg/kg IV on day +1. Then MTX will be given at 0.33 mg/kg on days +3, +6 and +11.

Patients will receive Mycophenolate beginning on day +1. Patients \>40 kg will receive Mycophenolate 1000 mg twice a day. Mycophenolate should be given orally twice a day. IV formulation may be used if the patient cannot tolerate oral route. Patients \< 40 kg will receive MMF 45 mg/kg/day (15 mg/kg three times a day). MMF may be given orally or intravenously as per institutional protocol

MTX 5mg/m2 IV on day +1, +3, +6. If patient\<10 kg MTX will be given at 0.17 mg/kg on day +1, +3, and +6.