Quote Originally Posted by crookedc
Does the instant tests that my parole office uses check for creatine levels, or is that only in a lab test?
There are instant drug testing kits available that feature built-in validity checks with creatinine and specific gravity being among the validity checks. Examples of these type of test kits (in both 'card' and 'test cup' forms) can be found at online medical supply distributors like craigmedical and meditests.

It all depends on the P.O. and how much money the P.O. wants to spend.