Well, most AD will be in your system up to 10 days. Depending on your system it can be more or less.
But remember, that would be if you were to take 1 pil and never take one again. I would think that if you keep taking it for a long time time would be added on that. I read some chart before where it said the day after you take its a certain percent in your body, then the percent goes down once again, then again, again, and so on for those ten days.
So I would wager if you have taken it for a long time, it may be more. Simply because if you think about it logically if one pill is going to take 10 days to get out of way, but next day you take another way, its not going to double the time..but more pills should equal a longer time.
And to me that makes sense because some people say that months after stopping they still fill effects.