Although I’m not qualified to rule out any disease or disorder (I’m not a medical professional), I suspect that the “dementia symptoms” that you think you have might actually be part of the cognitive deficit that many individuals with schizophrenia suffer from. I’ve read that some researchers actually consider schizophrenia’s cognitive symptoms to be a core part of the disorder. What “dementia symptoms” do you think you have?
The “schizophrenia symptoms” link on this site’s (schizophrenia.com’s) home page says that the cognitive symptoms of schizophrenia include the following: disorganized thinking; slow thinking; difficulty understanding; poor concentration; poor memory; difficulty expressing thoughts; and difficulty integrating thoughts, feelings, and behavior. I experience most of the symptoms I just listed myself when untreated, and even though the vitamin D that I’m taking now seems to be helping with the symptoms to an extent, I don’t know how well it will help me in the long run. Do you experience any of the symptoms that I listed? If you do, I would recommend mentioning them to your treatment professionals to see if they might recommend any treatment strategies. I will say that it’s my understanding that the cognitive and “negative” symptoms of schizophrenia tend to be more difficult to treat than the hallucinations and delusions, but maybe your treatment professionals might have some ideas that you might find to be beneficial.
Wishing you the best,