I would confront him and ask him what he planned on doing with it. Then I'd remind him that street drugs can un-do all the hard work you and he have done to help him -- they'll mess up his medications for sure and make his issues WORSE.
As for the Abilify, it sounds like it's addressing his depressive symptoms, but because he is taking nothing to treat the mania it is coming out in spades. He probably needs another medication (like Depakote) to address that aspect of things. And FWIW, SSRI's like Zoloft can be activating for people with a mood disorder like bipolar. It certainly did for my difficult child 2. If I were you, I'd call the psychiatrist and ask some more questions about the symptoms you are seeing and what else can be tried to address them. Don't wait for your next appointment -- medications like Depakote can take up to 6 weeks to build up to therapeutic levels, so the longer you wait, the longer it will be until your difficult child gets any relief.
Good luck!
