Justin Delgado is husband to Kacie Doyle-Delgado, diagnosed at age 11. After more than a decade together, he considers himself to be an expert carb counter and Dexcom inserter. He graduated with his Master of Science in Finance from the University of Utah in 2013 and has been working in commercial banking since then. He attended his first Friends for Life conference in 2015 and is looking forward to volunteering with the teens.
March 24, 2002
Question from Aiken, South Carolina, USA:
It is time to replace my daughter's NPH (we change bottles every 30 days), and for the past few days, in spite of reducing the dose, she is still going low. I know it is the NPH causing this because of the time of day. I guess I will find out when I switch bottles tomorrow, but I have always read on this site and others that bad insulin caused highs. The NPH doesn't look clumpy or anything and her routine and food intake haven't changed. Have you ever known NPH to cause lows when it was going bad?
The only way that “older” NPH insulin would cause lows would be related to your not mixing the vials well. This would mean that towards the end of each vial you would have already used up relatively more diluting liquid and therefore have more concentrated insulin because of more insulin compared to dilution fluid. Mixing thoroughly should stop this completely.