7. History of hypersensitivity to any of the study drugs or to drugs of similar chemical classes 8. Patients being treated with drugs that are strong inducers or inhibitors of cytochrome P450 3A4 9. Patients with a clinically significant systemic infection within 30 days prior to transplant 9 10. Patients who have any surgical or medical condition, such as severe diarrhea, active peptic ulcer disease, or uncontrolled diabetes mellitus, which in the opinion of the investigator, might significantly alter the absorption, distribution, metabolism and/or excretion of study medication.