 - Participants who are undergoing treatment with any of the following drugs: pimozide, ergotamine tartrate, dihydroergotamine mesilate, ergometrine maleate, methylergometrine maleate, midazolam, triazolam, vardenafil hydrochloride hydrate, sildenafil citrate Revatio, tadalafil Adcirca, blonanserin, azelnidipine, rivaroxaban, voriconazole. 