First, this is for schizophrenia, so I'm wondering why you were taking it for depression. But doctors do get to use drugs once they're approved for whatever they want to. I did a little checking, which you can do with the good old Google, and this drug doesn't store in the liver much, so it's long gone from your system. Why do you think it's not? What you may be experiencing is a withdrawal from discontinuing the drug. I don't know if you did it abruptly or tapered off, as this drug is often injected, but drugs that affect brain neurotransmitters can be hard to stop taking for many people. Whatever you're feeling, I don't think it's the drug still being in your system after this much time.