Mother is 94, had a stroke 2 years ago. Can't walk, legally blind (can see dark areas for faces, can barely see her plate, now for last 12 months growing increasingly paranoid, delusional, aggravated at times. On low dose paxil as she doesn't handle drugs well. Month ago started exelon by mouth. Last ten days sleeping almost all day, not like her. Cutting exelon back to just evening doses and trying that. Who should really be prescribing this drug? Is there a specialist?