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Comparative Study
Controlled Clinical Trial
Journal Article
Therapeutic drug monitoring of mycophenolate mofetil and enteric-coated mycophenolate sodium in patients with systemic lupus erythematosus.
Expert Opinion on Pharmacotherapy 2010 April
OBJECTIVE: Mycophenolic acid (MPA), the active form of mycophenolate mofetil (MMF) and enteric-coated mycophenolate sodium (EC-MPS), is used to treat systemic lupus erythematosus (SLE). MMF and EC-MPS pharmacokinetics were examined to devise guidance for therapeutic drug monitoring (TDM) for SLE patients with normal renal function.
RESEARCH DESIGN AND METHODS: This observational study included 21 patients receiving MMF (1000 mg twice daily) and 14 taking EC-MPS (720 mg twice daily). MPA AUC between 0 and 12 h (AUC(0-12h)), C(max), T(max), and 12-h trough concentrations (C(12h)) were determined.
RESULTS: Means of dose-normalized MMF- or EC-MPS-MPA C(max) were 64.6 +/- 25 and 61.4 +/- 27.1 h mg/l, respectively. MPA T(max) for EC-MPS was longer and more variable than for MMF. MMF-MPA AUC(0-12h) and C(12h) were correlated (r = 0.78, p = 0.0001), but EC-MPS-MPA C(max) and single concentrations were weakly correlated. A limited-sampling strategy (LSS) combining C(max) and C(12h) gave satisfactory predictive performance to estimate MPA AUC(0-12h) after EC-MPS administration.
CONCLUSIONS: For TDM in SLE patients with GFR > 60 ml/min/1.73 m(2), C(12h) after MMF ingestion could predict MPA AUC(0-12h), while an LSS around T(max) should be used for patients on EC-MPS.
RESEARCH DESIGN AND METHODS: This observational study included 21 patients receiving MMF (1000 mg twice daily) and 14 taking EC-MPS (720 mg twice daily). MPA AUC between 0 and 12 h (AUC(0-12h)), C(max), T(max), and 12-h trough concentrations (C(12h)) were determined.
RESULTS: Means of dose-normalized MMF- or EC-MPS-MPA C(max) were 64.6 +/- 25 and 61.4 +/- 27.1 h mg/l, respectively. MPA T(max) for EC-MPS was longer and more variable than for MMF. MMF-MPA AUC(0-12h) and C(12h) were correlated (r = 0.78, p = 0.0001), but EC-MPS-MPA C(max) and single concentrations were weakly correlated. A limited-sampling strategy (LSS) combining C(max) and C(12h) gave satisfactory predictive performance to estimate MPA AUC(0-12h) after EC-MPS administration.
CONCLUSIONS: For TDM in SLE patients with GFR > 60 ml/min/1.73 m(2), C(12h) after MMF ingestion could predict MPA AUC(0-12h), while an LSS around T(max) should be used for patients on EC-MPS.
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