Safety in Lactation: Antituberculosis drugs

The US Centers for Disease Control and Prevention and other professional organisations advise that breastfeeding should not be discouraged in women with tuberculosis. However, the amount of the medicine found in the breast milk is insufficient to treat infant tuberculosis.
Capreomycin and cycloserine are older drugs reserved for multi-resistant tuberculosis. Streptomycin is an unlicensed preparation and is also reserved for resistant organisms.
The standard regimen of isoniazid, rifampicin, pyrazinamide, and ethambutol is considered compatible, with some precautions, with breastfeeding