If i took 1 suboxen how long till its out my system?

Depends on what: you are really asking. In terms of how long it remains an active drug that can produce effects in your body, about a day or two. If you are asking how long can it be detected in body fluids, that is a completely different question, and may be as long as a week (or even more) depending on whether you took 2 mg or 8 mg (or another dose).