- Patient has a requirement for concurrent treatment with medications that are strong inducers or inhibitors of cytochrome P450 (CYP3A) (see Appendix). Patients should discontinue these medications for at least 2 weeks prior to the first dose of ridaforolimus. Concomitant medications that are metabolized by CYP3A are allowed (e.g., simvastatin or atorvastatin)