you cant.
Generally,cocaine,heroin,meth etc. only stay in your system for 72 hours.
wait three days. or flush the hell out of your system, meaning drink a lot of water. cranberry juice is also good to flush with.
it takes about 28 days or a month to flush it completely out of the body.
Cocaine extensively metabolized primarily in the liver. Unlike marijuana which is a fat soluble substance Cocaine usually stays in your blood stream for about 8 days. You can purchase detox formula which will remove it in 2-3 days.
How long does cocaine take to get out of the system
How long does cocaine stay in your system?
The heroin will be, but the metabolites they test for won't.
10 days
3 days
Buy drinking substantial amounts of water opiates can be cleared from the system after four days.
The general rule is that heroin, speed, and cocaine stay in your system for about 72 hours (3 days). If you can, though, I would wait at least 5 days, just to be on the safe side.
Heroin takes approximately 72 hours (3 days) to leave your system.