May increase risk of hypotension w/ strong or moderate CYP3A4 inhibitors (PIs, azole antifungals, macrolides eg, erythromycin or clarithromycin, verapamil or diltiazem). Monitor BP & dose regulations w/ CYP3A4 inducers (eg, rifampicin,
Hypericum perforatum). Increased BP lowering effects w/ grapefruit or grapefruit juice. Risk of hyperkalemia w/ dantrolene. Increased blood levels of tacrolimus. Increased exposure of mTOR inhibitors (eg, sirolimus, temsirolimus & everolimus). Increased variable trough conc of cyclosporine in renal transplant patients. Increased exposure to simvastatin.