Gosh Ele, I don't envy you, it is overwhelming when the #s all over the place. On the one hand yesterday you got a 75% drop on 2.2u, which to me is a signal to reduce the dose a hair. On the other hand, you then got a pretty sharp rise back to +2 (80ish to 180ish in just a couple hours) rather than the nice long hang he sometimes gets, which suggests that you won't get the same response the next cycle (and yep, you didn't). Which suggests a dose increase for that cycle.
Here are the choices I see:
1) Try lowering the dose like you said and take a really systematic approach. Go back to the lowest dose that you feel 100% sure is not too much, and then raise in small increments every 3rd day or so. This is the approach that finally worked for Bix - probably mostly because it worked for *me* and took a lot of the decision making out of it. It was hard for me to stick out the higher #s for a few days, but it paid off big-time in our case.
2) Take an alternate PZI approach, and decide on guidelines that work for you, and commit to that approach for x amount of time and see if it will work. For instance maybe try to work out a definitive sliding scale, try shooting early, try shooting based on the rate of rise, etc., whatever makes sense to you, but write down your plan and really dedicate yourself (not like you aren't already!!!) to making it work if possible. So for instance decide that anytime you see a 150 past +8 you will check for a rising # and then shoot if you can. Frankly, I probably wouldn't even bother with this approach - I think it's too stressful, he's too variable, and you've put enough effort already into making sense of it and this would probably have you beating your head against the wall (I'm guessing your walls may already be dented a bit! :lol: ), but just mentioning it for thoroughness.
3) Lantus (or Levemir? I've heard that's better for kitties who have been on insulin over a year, but I have no idea why - also I don't know if Lev takes as long to build up the shed as Lantus seems to?).
4) Decide to lower your standards and not worry about it much - his quality of life seems good even with the higher #s, right? And you already know he has other health problems, which could be contributing to his BG wonkiness. So just focus on him feeling good, test a lot less, pick a dose and run with it for a while, testing PSs & occasional nadirs/mid-cycle #s to be sure he isn't too low, and then reevaluate the dose maybe once a week or two (afterall, this is what most vets recommend, right?), and take the pressure off yourself. Although the laid-back approach isn't generally advocated here, I'm a firm believer that there is nothing wrong with that. I'd do it myself if I could just chill out a little, lol.
If it were me, I would probably try option #1 if I weren't totally burned out by now with all you've already been trying for weeks now. If I were burned out, I'd probably switch to Levemir (or Lantus, if someone were able to convince me that it is just as good for long-timers, and has no longer shed building time than Lev). And if I switched, I would consider using R (?) in the beginning if the #s were running high.
And I can't honestly say I wouldn't take approach #4. Quality of life for both of you (and the rest of the household) are really what is important. Seems like you've been tearing your hair over his #s for ages now, and with all your other stresses.... and then it isn't working anyhow. Gosh I'm a downer. :lol:
My only hesitations in saying just switch to L or L are that 1) he was nicely regulated on PZI for a while, so in theory it seems like you could get back to that point someday, and 2) the possibility of high #s for weeks til the shed is full. If it weren't for those 2 things (and I'm not sure either of them is a compelling argument at this point), I would say "switch insulins, & don't look back!".
Well anyhow, hope some of that helps. I seem to be writing a lot of books lately, sorry about that.
[ETA: I left out choice 5) figure you are actually closer than you realize, don't get discouraged by a couple cycles that aren't great, and just fine tune the dose a little more. I'm not sure I could face this choice in your shoes, seems like you've struggled long enough, but then on the otherhand, sometimes just having faith and sticking it out a little longer on the plan you are on can work wonders. Maybe shooting 2.3u on the faster rise yesterday would have been perfect, and maybe just little adjustments like that are all that you need?
More questions than answers here I realize. :roll: ]