Cyclosporine Level C-2 / HPLC, Whole EDTA is a test used to measure the level of cyclosporine in the blood after a specific time has passed following dose administration, usually two hours (C-2) after taking the medication. This analysis is based on high-performance liquid chromatography (HPLC) to ensure accurate and reliable measurements. Cyclosporine is an immunosuppressive drug commonly used in organ transplant patients to prevent graft rejection. This test contributes to evaluating treatment effectiveness, as it helps physicians adjust appropriate dosages according to the individual patient’s needs and is also used to monitor potential toxicity. It is recommended to perform this test periodically to ensure treatment success and patient stability.