I just started Apidra yesterday. Since I've heard it's faster than Humalog for some people, and Humalog is all I've known for the past 12 or so years (before that it was Toronto), I thought I should test how long it works for. I only started it today (yesterday posting this) and noticed that when I ate my 1.5 hour reading was excellent but at three and four hours I was high.
Here are the five-hour results of correcting a high 4.5 hours after last eating and with no insulin on board. I will have to do this again to confirm, but amazingly it appears Apidra has done most of its work by the two hour mark and is basically gone by three hours! If this repeats then that is incredibly fast (I had my IOB settings at 3.5 hours for Humalog) and I'll have to start using combo boluses more for foods, I think. It also didn't bring me down to my target of 5.5 so my correction ratio may need adjusting, but as I said, I will repeat the test first.
T-0:00 - 15.1 (272)
T-0:30 - 13.8 (248)
T-1:00 - 11.3 (203)
T-1:30 - 10.0 (180)
T-2:00 - 8.6 (155)
T-2:30 - 8.0 (144)
T-3:00 - 7.9 (142)
T-3:30 - 7.5 (135)
T-4:00 - 7.5 (135)
T-5:00 - 7.7 (139)
Even as fast as this seems compared to Humalog it's also amazing, looking at this, how "slow" fast-acting insulin is when you consider naturally-produced insulin that goes directly into the bloodstream would have corrected that reading in something like five minutes (if non-diabetics needed corrections, that is ...)!
