<s>[INST] My 77 year old father has parkinsons for sevarl years. He has no dementia but the medications he is on seems to have made him more dull and able to comprehend and communicate clearly. His short term memory seems to be affected. A recent brain scan shows his brain working normally. Should we ask the doctor to revaluate his medications [/INST] Hi, Thank you for posting your query. I have noted your fathers diagnosis and current symptoms. Memory and language problems may occur in people with Parkinson's disease (PD), especially after several years of suffering. It is good news that CT can of brain is normal, as it excludes other problems such as brain stroke, tumors, etc. Medicines used for treating PD may cause e=adverse effects, so, I would request you to send the medication details, along with the dose and timings. It would be also worthwhile discussing the medications with his neurologist. I hope my answer helps. Please get back if you have any follow-up queries or if you require any additional information. Wishing you good health, Chat Doctor. Ly/ </s>