Looks like both hands now discolored.

[Maru Kitteh]

37. As a nurse who has also done some professional portraiture, it looks

like venipuncture sites, 2 or 3 sticks, about 3-6 days ago. My guess would be a simple blood draw. I can’t imagine why he prefers the hands but he is a very stupid man with strange habits and a historically poor capacity for logic so . . .

As an aside, I’ve not seen any evidence that he would be on an IV drug for Alzheimer's, because I haven’t seen any evidence of Alzheimer’s type dementia. Given his lifestyle, diet and known medical history, I can buy cognitive decline and perhaps early-ish stages of vascular dementia. I also see evidence of a minor stroke.

DuckDuckGo AI overview of Alzheimer’s vs. vascular dementia:

Search Assist
Alzheimer's disease primarily causes memory loss and difficulties with language and problem-solving, while vascular dementia often leads to issues with attention, planning, and reasoning, and may present with sudden changes in symptoms following a stroke. Both conditions can overlap, but the early symptoms of vascular dementia may not emphasize memory loss as much as Alzheimer's.
Mayo Clinic National Health Service (NHS)