I have had delusions in the past and take Risperdal which stoped them. Lately, I have had paranoia even with the Risperdal. I am feeling fine, I mean, no depression or mania right now. What causes one to have psychotic features "out of nowhere"? My doctor increased my Risperdal and I am fine right now, but I am concerned and curious as to why I would have psychotic features. I don't understand! Also...does this indicate that I would be one that would need an antipsychotic always?