Suggest An Effective Alternative For Depakote

Hi, my son is going to be 10 years old about 4 7 and about 95lbs. He has A.D.H.D and O.D.D he s had this for several years already. He s taking Concerta 36 and Abiliy 10 mg in the morning, and Ritalin 10 mg at 2pm, also takes Trazadone 50mg and was taking Depakote 3 pills (red) at night. But recently about 2 weeks now I quit giving him the Depakote because he broke out in hives and a rash. My question is, is there another pill he can take in place of the Depakote to help with his moods in the evening. He s been very defiant, the Depakote was working but he was miserable taking them with the hives and rash. Plus I know theres side effects with all meds but the past couple of days hes gone to school complaining of headaches and sometimes a stomach ache. He does eat in the morning, it only seems to be in the morning which is 2 hours after he takes his morning pills. Is there anything we can do to help prevent this. Would you suggest maybe giving himTylenol before he goes to school. Thank you Raina (a concerned mom)