My Son Has Got Pallister Hall Syndrome He Has Always

My son has got pallister hall syndrome he has always had gelastic seizures and became incontinent at ten years old he went thru puberty at one and a half years old he was treated with zoladex injections every 28 days in his stomach till he was 16 years old he is 24 years old now his medication is tegretol 300mg morn 400 mg night lamotrigine 75mg 2x he also just started clobazam 10mg 2x day two weeks ago he is having extreme mood changes crying yelling and hardly sleeping at all he was also on antihistamines for one week only two weeks ago do u think we need to stop this new medication as I think he may be having major side effects