13. Current or expected treatment with potent CYP3A4 inhibitors (See Appendix 6), cytotoxic agents (azathioprine, mercaptopurine, cyclosporine, cyclophosphamide, etc.), ranolazine, digoxin, theophyline, desipramine, sulphonylurea, thiazolidinedione, diuretics, atypical antipsychotic agents, or phenytoin