Hi , I am currently helping a dear friends husband with her care. She is always in great pain from arthritis in most joints and despite having liquid morphine twice a day she has been prescribed oxycodone. Recently she has attacked her husband and displays many of the symptoms listed as side affects from oxycodone, now there is a query from the hospital where she went for high blood pressure that her behaviour may indicate early dementia how do we know if it is the oxycodone or dementia? She is in her late eighties and is otherwise very active and alert