- Patients who are receiving treatment with medications known to be moderate and strong inhibitors or inducers of CYP3A4/5 or with drugs metabolized by CYP2B6 or CYP2C9 that have narrow therapeutic index that cannot be discontinued before starting treatment with LDE225. Medications that are strong CYP3A4/5 inhibitors should be discontinued at least 7 days and strong CYP3A/5 inducers should be discontinued for at least 14 days prior to starting treatment with LDE225 Some of these medications are recognized to cause rhabdomyolysis.)