Tell your doctor about all your other medicines, especially:
cholestyramine;
digoxin, digitalis;
ketoconazole;
a diuretic or "water pill"--hydrochlorothiazide, HCTZ, Diovan HCT, Hyzaar, Maxzide, Tenoretic, Zestoretic, and others;
seizure medicine--phenobarbital, phenytoin; or
steroid medicine--prednisone, dexamethasone, fluticasone, and others.
This list is not complete. Other drugs may affect calcitriol, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
 Calcitriol drug interactions (more detail)
