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Published on: June 11, 2012
Population pharmacokinetics of glyburide in patients with well-controlled diabetes
W G Tracewell1, D J Stalker, P A Maloley
1Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha 68198-6025, USA.
Study Objectives:
To investigate glyburide pharmacokinetics in patients with well-controlled noninsulin-dependent diabetes mellitus (NIDDM), and test the hypothesis that intersubject variability in the glyburide dose is due to patient differences in the drug's pharmacokinetics.
Methods:
Prospective, open-label study.
Setting:
University-affiliated, internal medicine outpatient clinic.
Patients:
Fifty-one patients with NIDDM (11 women, 40 men, mean age 56.7 +/- 15.3 yrs) receiving oral glyburide and with well-controlled glycohemoglobin levels 10.0% or below.
Intervention:
After fasting overnight, patients ingested their regular morning dose of glyburide and then ate breakfast. Blood samples were drawn before dosing and between 0.5-2 hours, 2-5 hours, and 5-10 hours after dosing.
Measurements And Main Results:
Serum glyburide was assayed by high-performance liquid chromatography and pharmacokinetics by NONMEM. Glyburide clearance was proportional to weight and greater in older patients (> 60 yrs).
Conclusion:
Variability in the glyburide dose was not primarily due to intersubject differences in the drug's pharmacokinetics.
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