How is tuberculosis usually treated?

Antibiotics. While it depends on the type and site of the tuberculosis (TB) infection, TB is generally treated with a combination of 3 or 4 antibiotics. The antibiotics are used for 6-9 months, and sometimes longer depending on the nature of the infection. Tb is a notoriously slow dividing bacteria, and this slow growth is the reason it takes so long for a TB infection to be treated.