Will cocaine use show up in a routine blood work for a physical? How long does it stay in your blood stream?

Not checked. Cocain is not usually checked in routine blood work. Even if its checked it should be out of your system in few days.
No. No Cocaine will only show up if you do a drug test. It is a drug tested in urine drug screens if that is done but you have to specifically test for it.
Depends. I knew folks prior to medical school that used pretty heavily. People who do Cocaine arent just contending with the addiction potential ( which is bad enough), but they don't know just how bad it is for your heart, even if you don't have a heart attack per-se. Google Cocaine induced nonischemic cardiomyopathy. Some physicals do drug screens, some do not. It's realllly bad for you.