yes you can
No, but you can not use cocaine and pass a drug test for cocaine.
All of them
yes
You pass the test easily if you don't use cocaine. Otherwise, only time can help you.
Tachycardia
it depends on when you did it and how much
Limited group of friends. You tend to stick to people who also use cocaine
Maybe, but it will affect the unborn child.
extreme chances in blood pressure
Not legally.
Yes you become permanently unattractive.
Absolutely - not ! The residue of cocaine is in your bloodstream... and will be present in your saliva no matter how much you brush or use mouthwash ! The simple answer is - if you need to pass a drug test - DON'T TAKE DRUGS.... PERIOD !