Medical patch should have an application delay for non-doctors

[Roomba]

b) make patches very slowly infuse their chems, requiring 30+ seconds of skin contact to dump it all

An average patch contains 40u of chemicals. That’s 1.29u or less infused per second with your proposed speed, nowhere near as speedy as you’re claiming on all your subsequent posts.

Well i'm not suggesting cigarette-level slowness, more like 1/4 of the contents every 5 seconds or so.

This is 10u every 5 seconds - an average of 2u per second.