Blood test/Full medical checkup (for a tentative job).. do they testing for drugs or newly for serious illneses/disease?

I am curious on this. Do these medical checkups also include test on drug usage or intake.

*Curiosity kill the cat*

Answer:
The employer often get a full set of tests since they are roughly the same cost as a more constrained series.

I know someone who had a liver enzyme abnormality (not a disease in recent times a freaky set of triglyceride levels). The company withdrew its opportunity offer until he proved he be not an alcoholic whose liver enzymes were ruined by cirrhosis of the liver.
It's entirely up to company policy. Comprehensive drug screen can be pretty pricey, so not every company wants to wage for them.
  • Doctors vs. Nurse Practitioners?
  • VICODIN? Does vicodin make u violent if you take it with alcohol.? anyone have stories of this? pls help?
  • How can i prevent or relieve migraines?
  • Is being anxious a side effect of penicillin??
  • Which profession ?
  • "how do you take blood pressure witha stethescope and a sphygmomonameter?
  • Is it "preventive" or "preventative" medicine?
  • Project Help *On a Drug*?
  • What is so wrong with stem cell research, if it could save MILLIONS of lives?
  • How quickly does Aleve/naproxen work?
  • Chorioamniotic Separation (Placenta seperating from uterus) in Pregnancy?
  • Taking Elavil when I'm not depressed?
  • If a personage receive blind bcoz of retinadetachment is in that any operation possible so that eyesight can verbs?