Cyclosporinedosage

Recommended Dosage for Sandimmune Capsules Sandimmune (cyclosporine capsules) 25 mg and 100 mg and Neoral (cyclosporine capsules), MODIFIED 25 mg and 100 mg are not mutually substitutable on a mg-to-mg basis due to differences in pharmacokinetic profiles. If it is appropriate to switch from Neoral capsules, MODIFIED, to Sandimmune capsules, increase the frequency of cyclosporine monitoring (the cyclosporine dosage may need to be increased to reach the desired cyclosporine exposure and reduce the risk of insufficient efficacy). If it is appropriate to switch from Sandimmune capsules to Neoral capsules, increase the frequency of cyclosporine monitoring (the cyclosporine dosage may need to be decreased to reach the desired cyclosporine exposure and reduce the risk of cyclosporine-related adverse reactions). The initial oral dose of Sandimmune capsules should be given 4 to 12 hours prior to transplantation as a single dose of 15 mg/kg. Although a daily single dose of 14 to 18 mg/kg was used in most clinical trials, few centers continue to use the highest dose, most favoring the lower end of the scale. There is a trend towards use of even lower initial doses for renal transplantation in the ranges of 10 to 14 mg/kg/day. The initial single daily dose is continued postoperatively for 1 to 2 weeks and then tapered by 5% per week to a maintenance dose of 5 to 10 mg/kg/day. Some centers have successfully tapered the maintenance dose to as low as 3 mg/kg/day in selected renal transplant patients without an apparent rise in rejection rate. See Blood Concentration Monitoring, below. Recommended Dosage of the Sandimmune Capsules in Patients with Renal Impairment Cyclosporine undergoes minimal renal elimination and its pharmacokinetics do not appear to be significantly altered in patients with end-stage renal disease who receive routine hemodialysis treatments (see CLINICAL PHARMACOLOGY). However, due to its nephrotoxic potential (see WARNINGS), careful monitoring of renal function is recommended; cyclosporine dosage should be reduced if indicated (see WARNINGS and PRECAUTIONS). Recommended Dosage of the Sandimmune Capsules in Patients with Hepatic Impairment The clearance of cyclosporine may be significantly reduced in severe liver disease patients (see CLINICAL PHARMACOLOGY). Dose reduction may be necessary in patients with severe liver impairment to maintain blood concentrations within the recommended target range (see WARNINGS and PRECAUTIONS). Recommended Dosage of the Sandimmune Capsules in Pediatric Patients In pediatric usage, the same dose and dosing regimen may be used as in adults although in several studies, children have required and tolerated higher doses than those used in adults. Adjunct therapy with adrenal corticosteroids is recommended. Different tapering dosage schedules of prednisone appear to achieve similar results. A dosage schedule based on the patient’s weight started with 2.0 mg/kg/day for the first 4 days tapered to 1.0 mg/kg/day by 1 week, 0.6 mg/kg/day by 2 weeks, 0.3 mg/kg/day by 1 month, and 0.15 mg/kg/day by 2 months and thereafter as a maintenance dose. Another center started with an initial dose of 200 mg tapered by 40 mg/day until reaching 20 mg/day. After 2 months at this dose, a further reduction to 10 mg/day was made. Adjustments in dosage of prednisone must be made according to the clinical situation. Sandimmune capsules should be administered on a consistent schedule with regard to time of day and relation to meals. Recommended Dosage for Sandimmune Injection Sandimmune injection is for infusion only. Patients unable to take Sandimmune capsules pre- or postoperatively may be treated with Sandimmune Injection, for intravenous use. Sandimmune injection is administered at 1/3 the oral dosage of Sandimmune capsules. The initial dose of Sandimmune injection should be given 4 to 12 hours prior to transplantation as a single intravenous dose of 5 to 6 mg/kg/day. This daily single dose is continued postoperatively until the patient can tolerate the soft gelatin capsules. Patients should be switched to Sandimmune capsules as soon as possible after surgery. In pediatric usage, the same dose and dosing regimen may be used, although higher doses may be required. Adjunct steroid therapy is to be used (See aforementioned). Immediately before use, the intravenous concentrate should be diluted 1 mL Sandimmune injection in 20 mL to 100 mL 0.9% Sodium Chloride Injection or 5% Dextrose Injection using appropriate aseptic technique and given in a slow intravenous infusion over 2 to 6 hours. Based on the chemical and physical in-use stability data, the infusion should be completed within 6 hours at room temperature. Discard any unused diluted solution. If not administered immediately, the diluted solution can be stored at 2°C to 8°C (under refrigeration), provided that the total duration for both storage and infusion is less than 24 hours. The Cremophor ® EL (polyoxyethylated castor oil) contained in the concentrate for intravenous infusion can cause phthalate stripping from PVC. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Blood Cyclosporine Concentration Monitoring Several study centers have found blood concentration monitoring of cyclosporine useful in patient management. While no fixed relationships have yet been established, in one series of 375 consecutive cadaveric renal transplant recipients, dosage was adjusted to achieve specific whole blood 24-hour trough concentrations of 100 to 200 ng/mL as determined by high-pressure liquid chromatography (HPLC). Of major importance to blood concentration analysis is the type of assay used. The above concentrations are specific to the parent cyclosporine molecule and correlate directly to the new monoclonal specific radioimmunoassays (mRIA-sp). Nonspecific assays are also available which detect the parent compound molecule and various of its metabolites. Older studies often cited concentrations using a nonspecific assay which were roughly twice those of specific assays. Assay results are not interchangeable and their use should be guided by their approved labeling. If plasma specimens are employed, concentrations will vary with the temperature at the time of separation from whole blood. Plasma concentrations may range from 1/2 to 1/5 of whole blood concentrations. Refer to individual assay labeling for complete instructions. In addition, Transplantation Proceedings (June 1990) contains position papers and a broad consensus generated at the Cyclosporine-Therapeutic Drug Monitoring conference that year. Blood concentration monitoring is not a replacement for renal function monitoring or tissue biopsies.