How Long Does Crack Stay in Your System. The high from crack lasts just a couple of minutes. But how long does crack stay in your system is much longer. Crack cocaine can be discovered for days to weeks after use. Here, we'll talk more about how crack works in the body and why regular or heavy users have more to fret about than occasional users.…How Long Does Crack Stay in Your System. The high from crack lasts just a couple of minutes. But how long does crack stay in your system is much longer. Crack cocaine can be discovered for days to weeks after use. Here, we'll talk more about how crack works in the body and why regular or heavy users have more to fret about than occasional users.WWWW…