How is active TB disease treated?

Multi-drug therapy. Typically with a six month course of multiple anti-tb drugs: usually 2 months of 4 drugs followed by 4 months of 2 drugs.
Anti tb drugs. Usually 4 drug are used to treat TB for the first 4 month, then you stay on 2 of the drugs for an additional 4 months, for a total of six months of therapy.