Of course.
I read about a research made with memantine here in the forum. I handled the research to my pdoc. We agreed to use the medicine for the neg symptoms as off-label. The med just worked 15 days later.
I read this article: New Meta-Study: Memantine May Help as an add-on to antipsychotic treatment for residual negative and cognitive symptoms of schizophrenia
I even sent a message to @SzAdmin thanking him for the article.