Where I work, I'm next door to the "human resources/misc. tasks" lady. One of her tasks today is getting some company drivers prepared for their CDL testing and the drug test they have to take. This got me to wondering; what happens if a guy takes a drug test, and he's on all sorts of wacky drugs that are prescribed by his doctor? For example, what if a guy were on anti-psychotics, anti-depressants, pain killers, sleeping pills, etc., but all of it is prescribed by his doctor? How "clean" does a guy have to be to get a CDL?