Suzi
I’ll try to put this as politely as I possibly can

Elise and Bhooma have both been trying to tell you many times that Monkey is not overdosed. I believe I’ve even addressed this before.
They are spot on. They have linked SSs for you to illustrate what they are advising. They have put a lot of time, energy, care, and concern into helping Monkey and you.
I know you love your beautiful little girl but it comes down to whether you trust us, here, with all of our decades of experience, or you don’t. If you don’t, we might not be the place for you. Wendy, Sienne, and I, as moderators, have, cumulatively, about 30 years of experience with FD and have helped probably well over a thousand cats. We were trained and mentored by the very experienced members before us like Jill and Libby but including a vet tech named JoJo who had the most vast knowledge and experience with FD that I’ve ever seen. We’ve all used the TR protocol with our own cats.
Doing a rebound check like you did this morning is nothing short of harmful to Monkey. That is the long and short of it. You have to throw aside your nursing instincts because human diabetes does not equal feline diabetes. If you want Monkey to do better, you have to have a little faith in us and increase the dose after every six cycles in accordance with the TR protocol until she starts seeing numbers below 200. I understand it’s hard; I danced this dance for over 5 years; we’ve all done it. We get it.
It’s time to stop reaching for conclusions that are not there. She
is not overdosed; she can’t be with the way you’ve been dosing which, of recent and until this morning, was correct. I understand you are worried about IAA and acromegaly but it’s too soon and several members have told you that. Evidence from the Royal Veterinary College, which is an amazing resource for acro, is that testing before she’s been on insulin for 73 days is likely to not reveal the correct answer. We recommend you wait until she gets to 6u for good reason; we’ve seen cats that get up to over 5u and are not acro or IAA. On the possibility that she is acro, by reducing her dose and not continuing to increase it, you are not doing her any favors. She needs the insulin she needs so why not give it to her when the testing and the TR protocol indicate it’s time for an increase? You are just causing her to build up more glucose toxicity and it will take longer and more insulin to break through it, acro or not.
I’m sorry to be so blunt but somehow, with all the members trying to help, we aren’t getting through to you. I hope you will start listening. I strongly urge you to take her dose back up to 3.75u tonight and just consider this morning’s shot to be like a one-time reduced dose or a partial fur shot.