@macsucks
That is a rather high dose of ethambutol. Ethambutol can cause vision loss and you need to see an ophthalmologist at least every 1-3 months. I researched this after becoming legally blind due to ethambutol. Vision loss is rare, but can be permanent and devastating.If you give me your email, I’ll send you a copy of my research. Mine is chryl_hys@yahoo.com