Strong CYP3A inhibitors (eg, ketoconazole, itraconazole, voriconazole, clarithromycin, nefazodone, ritonavir, saquinavir, nelfinavir, indinavir, atazanavir & telithromycin). Potent CYP3A inducers (eg, rifampin, phenytoin, carbamazepine & phenobarb). Higher serum conc of simvastatin, lovastatin. Reduced effectiveness w/ >100 mg aspirin maintenance dose. Increased ticagrelor C
max & AUC w/ cyclosporine. Monitor digoxin levels w/ initiation or any change in Brilinta therapy. Delayed & decreased exposure to oral ticagrelor has been observed in patients w/ ACS treated w/ morphine.