The Lantus and Humolog at The Same Time Can Be Tricky

You are correct as usual that adjusting the Lantus and Humolog at the same time can be tricky. However, there is a trick that makes it possible. Since the Lantus (or Levimir) are long acting and working in the backround so to speak, one can adjust the Lantus dose strictly based on fasting BG first thing in the moening (or anytime well removed frorm any food intake).

The correction factor is a simple matter of experimentation to determine how many units of Humolog it takes to lower BG absent any food intake. This is easiest to do just before the optimal dose of Lantus has been established. In other words, if you are running 150 in the mornings, just figure ot with a few mornings of experiments how much Humolog it takes to bring you down to 100 or 120. It is then trivial to establish a correction factor formula.