<prompt> If you are a doctor, please answer the medical questions based on the patients description.My father having Parkinson last 15 Years he takes Sandopa 275mg 6tablets Sandopa c r 5 tablets Ropark 4tablets now his Problem is illussion he Sees Some One Sitting in our room under the bed People Sitting what we Shoul d do he is having 7 0 Years NO other health Problems  <response>: They are called HALLUCINATIONS and not ILLUSIONS to begin with... Hallucination is seeing something thats not there whereas ILLUSION is misinterpreting something that is present for something else. In your fathers case the first thing I would check would be an urinalysis to make sure he didnt have an infection since this is extremely common in elderly patients who do not move very well for whatever the reason. I might also look to any NEWER medications hes been taking for a short period of time before these HALLUCINATIONS started to see if this could be influencing. It is not uncommon for Parkinsons patients to have hallucinations but then, this may suggest he could be having a variant of Parkinsons disease as well...or that he may be suffering the earlier stages of dementia which can accompany Parkinsons patients in about 25 of cases. Please rate this a 5-STAR ENCOUNTER and write to me at Chat Doctor. 