Breastfeeding should be avoided by a mother on AT for how many weeks?
(Refer: AAP Committee on Infectious Diseases)
"Women with tuberculosis who have been treated appropriately for two weeks or more and who are not considered contagious may breastfeed.
Breastfeeding and ATT drugs
The American Academy of Pediatrics Recommendation

Women with tuberculosis who have been treated appropriately for two weeks or more and who are not considered contagious may breastfeed.
No toxicity has been reported from this small concentration in breast milk.
Pyridoxine deficiency may cause seizures in the newborn.
Supplemental pyridoxine should be administered to infants on INH or whose mother is taking the drug.
Breastfeeding may be discouraged in women who are yet to commence treatment at the time of delivery and those who are still actively excreting the bacillus while coughing.
It may also be discouraged as part of a prevention of mother to child transmission in HIV coinfection and women with tuberculosis of the lactiferous ducts or glands in the absence of evidence of congenital tuberculosis, isoniazide (10 mg/kg/day) should be commenced at birth and continued for six months in infants.
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