They took me off Rifabutin and put me on Rifampin, which I am tolerating better. I do feel that I get tired quickly on the Antibiotics. Have you all be taking them 3 times a week? I have been trying to space them so there is not such a big gap when there are 2 days without such as if I take them on Monday, Wed and Friday. I feel like I don't want my levels to fall to low by Sunday. Maybe I am worrying too much.