transition to seroquel for my 11 yr old son was just completed, ...

transition to seroquel for my 11 yr old son was just completed, over the period of coming off one medication and being switched to this, there has been a marked increase in mood swings and agression culminating in a full blown rage this evening. These symptons have increased in frequency and level with each increase of seroquel and leveling off of the other medication. Tonight was his last dosage, as one hour later he was literally out of control, agressive, destructive, and physically abusive.