They’re primarily checking for proof that you’re taking the medication.
If levels are too low: they assume you’re not using it, and if you’re not using it you must be selling it.
Levels too high: you’re abusing it.
Levels of something else (usually alcohol or cannabis): you’re a junkie.
All three can get your prescription revoked, and the testing requirements change based on the weather and what your doctor had for breakfast last Tuesday.
What’s up with the drug test part?
They’re primarily checking for proof that you’re taking the medication.
All three can get your prescription revoked, and the testing requirements change based on the weather and what your doctor had for breakfast last Tuesday.