Systematic review and meta-analysis of the efficacy and safety of minocycline in schizophrenia. – PubMed – NCBI
https://www.ncbi.nlm.nih.gov/pubmed/28181901
Something to consider for any refractory condition in which you might suspect inflammation or infection as the cause.
IL-6 or TNFa or hsCRP might be good screens.
Dr. Joris Wiggers 