Going to tag some Prozinc folks,
@Deb & Wink @Panic , for some more thoughts on this.
Two key times in insulin action that you want to keep in mind when deciding when to test are insulin "onset" and BG "nadir" (lowest point). For Prozinc, a
typical onset time is 2-3hrs post-shot, and a
typical nadir time is 4-7hrs post shot.
In the beginning, while you're trying to figure out Felix's patterns, you would ideally want to sprinkle tests around at all different times. With your work schedule and (I assume!) your desire to sleep sometime, you'll probably be getting most of your tests in the first half of the cycle, which works well given the onset and nadir times given above. In the mornings, unless you get up and shoot
really early, you'll probably be getting just a +2 or +3 "out-the-door" test that might give you an idea of whether Felix is likely to see an active cycle that day. In the evening, depending on your schedule, you might get to test a bit later and possibly be able to get a handle on his nadirs. You may also sometimes be able to get some tests in the later part of the morning cycle in late afternoons, depending on when you get home.
Especially when working (and sleeping!) it's hard/impossible to get the full picture of a cycle on any given day other than weekends, but by sprinkling tests around at different times on different days, we can put together the puzzle pieces and eventually know where to focus the testing.