If it is any thing like other drugs and the testing is the same (Lab Piss Test) then it will depend on your body fat and how active you are because all drugs i am familiar with are stored in your body fat.
Clen 1.5 days
halo 9-10 hours
anavar 9 hours
anadrol 7-15 hours
susp 2-3 hours
primo 5-7 days
stanazol 9 hours (oral)
Arimidex 3 days
dbol 4.5 hours
Clomid 5 days
It is posable that it could stay in the system for up to a few weeks. I am no drug test expert and my advice on the subject should not be taken as gospel. You are still making your own choices and the bottle and web site still clearly states "do not take if you are a tested athlete". That being said you take matters into your own hands and make a choice on your own and it is no one else fault but your own if you fail a test. NO MATTER WHAT!!!!!!!!!