If i appropriate one hit,how long will it stay contained by my system?

COULD IT BE CLEANED OUT IN TWO DAYS?If i appropriate one hit,how long will it stay contained by my system?
well, you inferior to mention on hit of what, if your talking something like pot, it will last longer than 2 days for sure, sorry, i know what im conversation about here. even associates who dont smoke, but just sit around beside smokers test positive after two days.
and if your getting tested, better hope its not a coat test make happen than its all over.
Less than 72 hours. I drug interview for work randomly. do it on friday, gone by monday.