title: Increase in cerivastatin systemic exposure after single and multiple dosing in cyclosporine-treated kidney transplant recipients.
abstract: OBJECTIVE
  The mutual drug-drug interaction potential of the 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor cerivastatin and cyclosporine (INN, ciclosporin) in kidney transplant recipients receiving individual immunosuppressive treatment was evaluated with respect to pharmacokinetic behavior of either drug and tolerability of concomitant use.
  
  
  METHODS
  Plasma and urine concentrations of cerivastatin and its major metabolites were determined after administration of 0.2 mg single-dose cerivastatin to 12 kidney transplant recipients (9 men and 3 women) who were receiving stable individual cyclosporine treatment (mainly 200 mg twice a day). These results were compared with the single-dose pharmacokinetic results obtained from a healthy control group (n = 12, age-comparable men). Cerivastatin steady-state pharmacokinetics were evaluated in the same patients during continued immunosuppressive treatment 4 to 6 weeks later, after a 7-day treatment of 0.2 mg cerivastatin once a day. Cyclosporine steady-state concentration-time profiles were determined in blood with monoclonal (EMIT [enzyme multiplied immunoassay technique] assay, parent drug specific) and polyclonal antibodies (FPIA [fluorescence polarization immunoassay] assay, cyclosporine plus metabolites) during cerivastatin cotreatment and compared with predosing data.
  
  
  RESULTS
  Coadministration of 0.2 mg cerivastatin once a day to the kidney transplant recipients treated with individual doses of cyclosporine and other immunosuppressive agents resulted in a 3- to 5-fold increase in cerivastatin and metabolites plasma concentrations. Cerivastatin and metabolites elimination half-lives were unaffected, and no accumulation occurred during multiple-dosing conditions. Cerivastatin had no influence on steady-state blood concentrations of cyclosporine or cyclosporine metabolites in these patients. The concomitant use of both drugs was well tolerated.
  
  
  CONCLUSIONS
  Cerivastatin and metabolites plasma concentrations were significantly increased in kidney transplant recipients treated with cyclosporine and other immunosuppressive agents. Displacement from the main site for cerivastatin distribution-the liver-by cyclosporine-inhibited liver transport processes may explain the decrease in both metabolic clearance and volume of distribution for cerivastatin and metabolites.
authors: Institute of Clinical Pharmacology, Bayer AG, Wuppertal, Germany.
authors: W
authors: W
authors: Mück
authors: I
authors: I
authors: Mai
authors: L
authors: L
authors: Fritsche
authors: K
authors: K
authors: Ochmann
authors: G
authors: G
authors: Rohde
authors: S
authors: S
authors: Unger
authors: A
authors: A
authors: Johne
authors: S
authors: S
authors: Bauer
authors: K
authors: K
authors: Budde
authors: I
authors: I
authors: Roots
authors: H H
authors: HH
authors: Neumayer
authors: J
authors: J
authors: Kuhlmann
mesh_terms: D000328:Adult; D001682:Biological Availability; D016022:Case-Control Studies; D016572:Cyclosporine / Q000008:administration & dosage* / Q000494:pharmacology*; D004334:Drug Administration Schedule; D004347:Drug Interactions; D005260:Female; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000097:blood / Q000493:pharmacokinetics*; D007166:Immunosuppressive Agents / Q000008:administration & dosage* / Q000494:pharmacology*; D016030:Kidney Transplantation; D008297:Male; D008875:Middle Aged; D011725:Pyridines / Q000097:blood / Q000493:pharmacokinetics*
chemical_list: D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D007166:Immunosuppressive Agents; D011725:Pyridines; D016572:Cyclosporine; C086276:cerivastatin