Would A Larger Dose Of Lorazepam Help Reduce Excessive Walking?

my son used to take saphris and we took him off because it made him walk and taking lorzapem or benzotropine didn t keep him from walking. He is 41 and took it for anger. The doctor switched him to zyprexa but he still walks but not nearly as much. The lorazapam doesn t stop the walking either. What can we do to stop the walking? He also ahs cerebral palsy and is deaf. He doesn t swallow pills so we have to use either liquid, chewable or dissolvable. He also takes carbmazapeine for seizures. The doctor says we just have to put up with the walking. He walks about 2 hours in the morning and 3 hours in the afternoon. During these times I offer things for him to do but he just wants to walk. Any help would be appreciated. Or should I try a larger dose of lorazapem?