so can they test for creatine levels right there from those type tests or only when sent to lab?
It could be either way. There are some instant 5 panel drug kits on the medical market that have built-in validity checks as well. And creatinine can be part of the validity check, depending on the test kit being utilized.
Do a Google search for "drug testing kits" so you get an idea of the variety of the instant testing kits available and how they work. :thumbsup: