Effects of Combination Therapy With Glyburide and Insulin on Serum Lipid Levels in NIDDM Patients With Secondary Sulfonylurea Failure
1991
Objective To compare the long-term effect of combined treatment with insulin and glyburide versus insulin alone on serum lipid levels in non-insulin-dependent diabetic (NIDDM) patients with secondary failure to sulfonylurea therapy. Research Design and Methods The study was a randomized double-blind placebo-controlled parallel trial with a duration of 325 days. The study was conducted at a referral-based endocrinology clinic. Subjects were a sequential sample of 20 patients with NIDDM with failure to respond to glyburide treatment after at least 1 yr of adequate glucose control with this therapy. The patients were randomized to treatment with insulin and glyburide (IG) or insulin and placebo (IP). Insulin was given twice daily to all patients as a mixture of NPH and regular insulins in dosages aiming at optimal glucose control. Glyburide or placebo was taken before breakfast (7 mg) and dinner (3.5 mg). Results Mean HbA 1c decreased from 11.1% (range 9.8–12.9%) before insulin to 9.1% (range 6.8–11.4%) on day 325 ( P P P P P
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