My 8 year old son has several mood disorders&anxiety issues.He's been on close to 20 med in the past 2 1/2yrs?

My son was very aggressive growing up,and steadily got more violent with me.By kindergarten he needed a special self contained clroom. He's been hospitalized more times than I can count,and a brief stint down in Austin,TX for 7months!The most recent hospitalization:he was diagnosed with Mood Disorder (nos) Anxiety disorder,Impulse Control Disorder,and Separation Anxiety Disorder(nos).I believe he has Bi-polar(runs in my family),and A.D.H.D.We're running outta med options.He just started Stratera..along with Risperdal(for the aggression),and clonodine(for sleep).Anyone out there have any advice for me about the meds?His violence at home has stopped,but his behavior has worsened at school(when others provoke him)usually.I'm desperate...