Hello. My 23 Year Old Son Is High Functioning Autistic

Hello. My 23 year old son is high functioning Autistic as well as 3 years into Tourettes. He has been suffering horrifically with belching, and a feeling of bloating. He gets very frustrated and then experiences stiffing of the arms accompanied by shaking (like a frankenstein) He also regeratates mouthfuls of food after eating for a while. He has been on Pantoprazole 40mg for about 6 weeks. He was taking Orap for the movement disorder for a good year and half to 2 years (2mg daily). He was recently weened off the 2 mg to 1/2 am 1/2 pm for one week March 4-11th. Any advice to help him stabilize would be so much appreciated. We don't know if side effects or withdrawal symptoms? Please advise me if you can help us! Thank you!!!!!