I have been asked how you handle these incidents. Honestly, we tried so many things. We tried spanking her, which no matter how "correctly" we did it, produced only greater anger. (she thought we were inviting battle.) We tried time-outs, loss of privileges, holding her, yelling at her (never works), throwing her in the car and driving around (actually the best calming tool) and in the worst of scenarios we took her to the hospital. If she was a danger to her sisters, we took her to the hospital. If she became a danger to herself, we took her to the hospital. If she was raging but it didn't become dangerous, we would let her rage in her room. Nothing strikes at your heart more than when you have an angry, out of control child who is scaring her siblings and you, and you feel helpless to solve the problem.
She has outgrown most of this, we think, or the meds she was put on at Meridell have solved this problem. She hasn't raged like that in a very long time. We are very thankful for the passing of this mixed-state behavior.