most employment drug screenings search for 4-6 common drugs that are easy to observe by a lab
1. THC
2. COKE
3. UPPERS, meth,speed
4. DOWNERS barbs, quaaludes some prerscription pain killers
5. XTC other desinger drugs
6. heroin
other companies with a larger employment recruitment budget will seek out
pcp/angledust
hashish
peyote
mescaline
and even inhallents
unless there is any amount of reasonable suspicion for AAS and diretics will not be tested
just remember each company is differing within their drug testing policies