Hi all! I was diagnosed with a positive skin test in July 2005. Doc put me on 9 months of Isoniazid. I took it for 7 1/2 months. Doc says no follow up is needed. How do they know if the meds worked or it hasnt become active if there is no follow up? After taking the meds it was pretty much dismissed and I havent seen a doc since. Is this something I should see a different doc about? Its really been eating at me as to whether this should be persued or left as is..... Any ideas?