Myhusband Has Parkinsons Disease And Has A Lot Of Hallucinations

Myhusband has Parkinsons disease and has a lot of hallucinations and paranoia. He believes we are in danger and some times thinks he smells smoke. His medications are as follows: Cinemet 25/250 5 times a day - Benztropine 1mg 4 times a day - Neupro patch 8mg - Amantidine 10ml 3 times a day - Seroquel at night. How can these meds be adjusted?