Probably something like this
U.S. Department of Transportation / Office of the Secretary of Transportation
49 CFR Part 40. Subpart F. § 40.85 What laboratories may be used for DOT drug testing?
Subpart F - Drug Testing Laboratories
§ 40.85 What drugs do laboratories test for?
As a laboratory, you must test for the following five drugs or classes of drugs in a DOT drug test. You must not test “DOT specimens” for any other drugs.
(a) Marijuana metabolites.
(b) Cocaine metabolites.
(c) Amphetamines.
(d) Opiate metabolites.
(e) Phencyclidine (PCP).
I had to pee quiz the other day, so I had asked a doc pal of mine if my blood pressure med would be a problem. So he showed me what CFR to look up