Spiralling downward after the abrupt discontinuation of an antidepressant should be expected. It happens regardless of why the antidepressant was prescribed. For instance, a woman committed suicide in the Cymbalta trials was what they call a "healthy" subject. She didn't have depression or any psychiatric diagnosis. Within days of the abrupt discontinuation of the drug she hung herself at the testing facility. After that, the drug company changed it's protocol and no longer discontinued the drug that quickly.
It doesn't always happen but no one should be surprised if it does, especially a doctor.
