Increased ciclosporin level by diltiazem, doxycycline, erythromycin, ketoconazole, methylprednisolone (high doses), nicardipine, verapamil, oral contraceptives. Drugs which reduce ciclosporin level are carbamazepine, isoniazid, phenobarbitone, phenytoin and rifampicin. Increased risk of convulsion when used concurrently with high-dose methylprednisolone. Potentially Fatal: Additive nephrotoxicity when used with aminoglycosides, amphotericin B, ciprofloxacin, colchicine, melphalan, co-trimoxazole and NSAIDs.
Ciclosporin is a strong immunosuppressant that acts mainly on the helper T-cells. It inhibits the activation of calcineurin and production of interleukin-2, thus reducing cell-mediated immune response.