There's always methylene blue under development by TauRX and in stage 3 trials. https://taurx.com/the-science/clinical-trials https://taurx.com/the-science/cli

There's always methylene blue under development by TauRX and in stage 3 trials. https://taurx.com/the-science/clinical-trials https://taurx.com/the-science/clinical-trials. Even more amusing is that you can take methylene blue right now as Troscriptions sells a non-prescription product containing pharmaceutical-grade methylene blue intended by the manufacturer for human use. Yes, your tongue will turn bright blue.