The symptoms of tuberculosis
do take some time to resolve. However if after 4 months of ant tb treatment if the fever
is still coming then you need to visit a pulmonologist for re evaluation of the causes of slow response. Does she have any chest symptoms? For chest complaints investigations like sputum afb smear, xray chest and bronchoscopy
may be required. Also confirm the doses of the medications as per her weight with a pulmonologist.