NDLI: A Prospective Trial of Risk Factors for Sulfonylurea-Induced Hypoglycemia in Type 2 Diabetes Mellitus

Content Provider	JAMA Network
Author	Burge, Mark R. Schmitz-Fiorentino, Kristen Fischette, Christine Qualls, Clifford R. Schade, David S.
Copyright Year	1998
Abstract	Context.— Retrospective studies have identified oral sulfonylureas, age, and fasting as major risk factors for hypoglycemia in patients with type 2 diabetes. Sulfonylureas may be withheld from elderly patients out of concern for hypoglycemia. Objective.— To evaluate the hypoglycemic effects of maximum doses of once-daily second-generation sulfonylureas administered to fasting elderly patients. Design.— A prospective, randomized, double-blind clinical trial. Setting.— The University of New Mexico General Clinical Research Center. Patients.— Fifty-two sulfonylurea-treated subjects with type 2 diabetes with a mean ( SD) age of 65.1 (5.7) years. Interventions.— Subjects were randomly assigned to glyburide or glipizide gastrointestinal therapeutic system ( GITS). Each subject participated in three 23-hour fasting studies after the sequential administration of 1 week of placebo and 1 week of 10 mg and 1 week of 20 mg of the assigned sulfonylurea. Main Outcome Measures.— Occurrence of hypoglycemia (defined as plasma glucose level <3.33 mmol/ L [60 mg/d: L]) and hormonal parameters during the final 9 hours of the 23-hour fast in patients who had taken sulfonylureas vs placebo. Results.— No hypoglycemia was observed during 156 fasting studies. Plasma glucose level was decreased (nadir, 4.9 mmol/ L [88 mg/d: L] for a 20-mg dose of glyburide vs 8.3 mmol/ L [150 mg/d: L] for placebo; nadir, 5.8 mmol/ L [105 mg/d: L] for a 20-mg dose of glipizide GITS vs 8.7 mmol/ L [157 mg/d: L] for placebo), and serum insulin was increased in the sulfonylurea studies compared with placebo ( P<.001). Plasma glucose parameters did not differ between the 2 sulfonylureas, but C peptide concentrations were increased in the glyburide group compared with glipizide GITS in the 20-mg study ( P=.05). Concentrations of epinephrine were increased in the sulfonylurea studies compared with placebo ( P<.001). Epinephrine secretion increased when glucose concentration fell below the mean ( SD) level of 9.10 (2.66) mmol/ L (164 [48] mg/d: L) in the 10-mg study and 8.77 (2.83) mmol/ L (158 [51] mg/d: L) in the 20-mg study. Conclusions.— Fasting was well tolerated among these elderly patients with type 2 diabetes treated with sulfonylureas. Older age should not be considered a contraindication to sulfonylurea treatment for diabetes. Stimulation of epinephrine secretion at normal or elevated plasma glucose levels appears to be the primary mechanism of protection against hypoglycemia in this study.
Ending Page	143
Starting Page	137
Page Count	7
File Format	PDF HTM / HTML
ISSN	00987484
DOI	10.1001/jama.279.2.137
Issue Number	2
Journal	JAMA
Volume Number	279
Language	English
Publisher	American Medical Association
Publisher Date	1998-01-14
Access Restriction	Open
Subject Keyword	epinephrine hypoglycemia type 2 diabetes mellitus sulfonylurea compounds plasma glucose glucose glyburide glipizide insulin c-peptide hypoglycemic agents bodily secretions elderly fasting
Content Type	Text
Resource Type	Article
Subject	Medicine

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