Diabetes Care, Vol 18, Issue 6 855-857, Copyright © 1995 by American Diabetes Association
A comparison of premixed insulin preparations in elderly patients. Efficacy of 70/30 and 50/50 human insulin mixtures
R Brodows and R Chessor
OBJECTIVE--To compare the postprandial hyperglycemic response to a standard
breakfast of two premixed humulin insulin mixtures, 50/50 (50% NPH human
insulin and 50% regular human insulin) and 70/30 (70% NPH human insulin and
30% regular human insulin) in elderly non-insulin-dependent diabetes
mellitus (NIDDM) patients. RESEARCH DESIGN AND METHODS--On two mornings,
each patient (n = 20) consumed a standard breakfast after a single dose of
50/50 or 70/30 insulin (0.3 U/kg) was administered in a randomized
crossover fashion. Plasma glucose and serum free insulin concentrations
were measured before and for 4 h after insulin administration.
RESULTS--Plasma glucose reached a peak at 60 min and a nadir at 240 min for
both types of insulin. No differences in maximum and minimum glucose
concentrations, time to maximum and minimum glucose concentrations, or
areas under the curve were noted. Free insulin levels did not differ
significantly. CONCLUSIONS--These results suggest that small changes in the
composition of premixed insulin mixtures in NIDDM patients may not result
in improved postprandial glycemic control.