Yes I was on it for 4 weeks because I also tested positive for TB...after 4 weeks I started having greyish to white colored stools and called my Doc and they discontinued it right away because it was my liver. The liver is responsible for ridding your body of dead red blood cells...thats what gives your stools their color...when the liver starts malfunctioning your stools will lighten up a great deal becoming grey to a white chalky color...so just keep an eye out for that. Thats a good way to tell. Hope this info helps. Good luck to u!!
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