> The elephant here is (aside from latent infection) the atypically long duration of treatment, which can exceed 6 months and is harsh. Many, even otherwise responsible people, will founder before the proper end of treatment and this, I think, is what terrifies health professionals - so much, that it almost seems to be avoided.

The fear is overblown. I've known multiple people do the 9 month treatment and none had issues. One person had tingling sensation and that was resolved by an increase in vitamin intake after consulting with a neurologist.

They were in their early to mid thirties. Most problems occur when older people take the medication.