Use of glyburide for the treatment of gestational diabetes: the San Antonio experience.
OBJECTIVE
Equivalent efficacy of glyburide and insulin for treatment of gestational diabetes (GDM) was demonstrated in a recent randomized trial. We describe our experience with glyburide in practice, and suggest factors that predict failure of glyburide treatment.


METHODS
Women with GDM treated with glyburide were studied. They were divided into two groups: those who achieved adequate glycemic control with glyburide, and those who did not. The groups were compared in terms of baseline characteristics, including diabetes risk factors and glucose testing values. Receiver operating characteristics (ROC) curves were generated to identify thresholds for fasting plasma glucose and body mass index (BMI) that would predict glyburide failure.


RESULTS
Seventy-five women were analyzed: 63 (84%) were successfully treated with glyburide, and 12 (16%) were not. Baseline characteristics were similar between the groups, except that failures had higher 3-h glucose tolerance test (GTT) values at all time points. ROC curves for fasting plasma glucose, pre-pregnancy BMI and BMI at diagnosis revealed no cut-off points for predicting failure of glyburide therapy. However, when fasting plasma glucose value on the GTT was > or = 110 mg/dl, 24% of women failed to respond to glyburide, compared to 12% at < 110 mg/dl (p = 0.15).


CONCLUSIONS
In treatment of GDM, glyburide is successful in achieving good glycemic control in most women. Women with high fasting plasma glucose levels, however, may not respond adequately to glyburide therapy.
Conway
D L
DL
Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Texas Health Science Center - San Antonio, San Antonio, Texas 78229, USA.
Gonzales
O
O
Skiver
D
D
D000328:Adult; D001786:Blood Glucose / Q000187:drug effects / Q000378:metabolism; D016640:Diabetes, Gestational / Q000097:blood / Q000188:drug therapy*; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D005260:Female; D005905:Glyburide / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D007004:Hypoglycemic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D011247:Pregnancy; D016032:Randomized Controlled Trials as Topic; D012189:Retrospective Studies; D013781:Texas
D001786:Blood Glucose; D007004:Hypoglycemic Agents; D005905:Glyburide