Increased risk of hyperkalaemia w/ medicines containing K, K supplements, K-sparing diuretics & certain antihypertensives. Increased blood ciclosporin levels w/ antibiotics (eg, erythromycin or azythromycin), anti-fungals (voriconazole, itraconazole), diltiazem, nicardipine, verapamil, amiodarone, metoclopramide, OCs, danazol, allopurinol, cholic acid & derivatives, HIV PIs, imatinib, colchicine, telaprevir. Decreased blood ciclosporin levels w/ barbiturates, carbamazepine or phenytoin, octreotide, anti-TB, orlistat, herbal medicines containing St. John's wort, ticlopidine, bosentan, terbinafine. Additive effect on kidneys w/ gentamycin, tobramycin, ciprofloxacin, amphotericin B, trimethoprim, melphalan, H
2-receptor antagonists, tacrolimus, NSAIDs eg, diclofenac, fibric acid medicines. Increased risk of gingival hyperplasia w/ nifedipine. Potential interaction w/ MTX, digoxin, HMG-CoA reductase inhibitors, prednisolone, etoposide, repaglinide, immunosuppressives (everolimus, sirolimus), ambrisentan, anthracyclines (eg, doxorubicin). Do not take w/ grapefruit or grapefruit juice.