12. Receiving treatment with medications known to be moderate and strong inhibitors or inducers of CYP3A4 or CYP3A5, drugs that are BCRP substrates, or drugs metabolized by CYP2B6 or CYP2C9 that have narrow therapeutic index, and that cannot be discontinued before starting treatment with LDE225. Medications that are strong CYP3A4 or CYP3A5 inhibitors should be discontinued at least 7 days prior to starting LDE225. Strong CYP3A4 or CYP3A5 inducers should be discontinued at least 2 weeks weeks weeks prior to starting treatment with LDE225.