There is no conventional treatment for prion disease, but methylene blue (Methylthioninium chloride), which has been around for over 100 years, has been investigated as a <i>preventive</i> treatment with some success in mouse models:<p><a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;23022479" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;23022479</a><p><a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;25958115" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;25958115</a><p>The problem is is that it&#x27;s not patentable and it&#x27;s super cheap.  Thus, various drug companies like TauRX are tweaking it a little so it&#x27;s patentable and are currently trying to get it through clinical trials.<p><a href="http:&#x2F;&#x2F;taurx.com&#x2F;science" rel="nofollow">http:&#x2F;&#x2F;taurx.com&#x2F;science</a>