My son is PDD and is taking 1ml risperdal in the morning and 1 ml in the evening. He is 9 1/2 and has been on the dosage for over 2 years. His Doctor recently has suggested Geodon. He is extremely social and very intelligent but has been reverting to "old" behavior patterns. Lately he has been showing extreme agitation and has begun hitting (usually his sister). The side effects of Geodon seem rather extreme! I'm not sure what to do..the Doctor is just suggesting...can anyone help me?