DebbieI cultured atypical mycobacterium when I was 11. It attacked my lungs before anyone knew it was happening, and I unfortunately had to have surgery to remove the damaged lower left lobe of my lung. Anyway, that is not the point, and certainly wasnt meant to freak you out. I was however, on a "cocktail" of 4 drugs, two of which were Rifampin and Ethambutol. (The others were Biaxin and switching off between cipro and bactrim). Anyway, yes I know about the rifambin turning things orange! haha. Anyway, I was one these 4 drugs for 4 1/2 years, and since the mycobacteria had caused such a problem early on, you can imagine how FRIGHTENED i was when my doctor said "I think its time we take you off these drugs." I would have been happy to stay on them forever, somehow it just felt safe. However, during those 4 1/2 years I successfully eradicated those bugs, and reached a point where i was MUCH healthier than I had ever been, despite my loss of a portion of my lung. Some people dont believe in so many pills & drugs, but with something like mycobacteria, i say, put me on as many as possible. I am glad my doctor was so aggressive. Good luck! and you are lucky you caught the mycobacteria before it caused more problems.-C20w/cf