What does the urine on the FAA medical test for?

Ive heard varying things on this, and am curious as to what the urine testing on the FAA medical exams (1st-3rd class) check for. Some sources say its just a test for kidney function/diabetes. While other state that this is a drug test, which seems unlikely as It diesnt explicity state in the FARs that this is part... show more Ive heard varying things on this, and am curious as to what the urine testing on the FAA medical exams (1st-3rd class) check for. Some sources say its just a test for kidney function/diabetes. While other state that this is a drug test, which seems unlikely as It diesnt explicity state in the FARs that this is part of an exam conducted by an AME.
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