Actually suboxone is used mostly as a meth addiction replacement but it is used with other addictions, suboxone is used to eventually decrease little by little until you are weened of, they had no proof she was at the final stage, that's probably why they wanted her back on it, so they could follow up on her eventually getting off of it as opposed to having her test positive and just "promise" she'll stop, again that's not just something you stop at the snap of a finger easily or alone.