ISD Sample Pretreatment — universal pretreatment reagent for the Elecsys Immunosuppressive Drug (ISD) assay portfolio on cobas e analysers (e 411, e 601, e 602, e 402, e 801). Methanol-based solution with zinc sulfate used to lyse red blood cells, precipitate proteins, and extract analytes from whole blood. A single reagent covers cyclosporine, tacrolimus, sirolimus, and everolimus testing. Content: 1 × 30 mL. Pack size: 100 tests.