Diabetes and Latent TB treatment

So I need some info: Has any of my fellow diabetics out there ever taken isoniazid and pyridoxine? I have had a positive TB skin test, figure I was exposed when I went to Haiti to help after the earthquake last year. Since I am over 50 yrs old infectious disease docs want to reduce my chances of the latent infection ever going active. The med info sounds like it may be kinda rough with the diabetes.