[Pharmacodynamics and pharmacokinetics of 2 glibenclamide preparations in type 2 diabetes. Intraindividual double-blind comparison of Euglucon 5 (HB 419) and Euglucon N (HB 420)]

Abstract

A new galenic form of glibenclamide (with a higher specific surface area for better absorption) was compared with the conventional form in 12 insulin-dependent and glibenclamide-treated diabetics (three women, nine men; aged 37-60 years) in a double-blind controlled crossover study. There was more rapid absorption, with a maximal serum concentration after 1 1/2 hours, compared with the usual preparation which gave a lower longer-sustained maximum of serum-glibenclamide level between 1 1/2 and 4 hours. In addition, there was more complete absorption so that the needed daily dose was decreased: 3.5 mg of the new form was bio-equivalent to 5 mg of the ordinary form. Duration of effect of the new form was not shorter despite different pharmacokinetics. Response of serum insulin and C-peptide level was the same in the two forms. On the other hand, the blood-glucose profile was significantly better with the new form.