Welcome to HCM,
After going through details of your wife she is suffering from Tuberculosis
I presume it is in the lungs, this is good that she is taking treatment regularly for 3 months.
He problem of pain in joints and foot could be due to hi uric acid level one of the drug Pyrazinamide
is known to increase the level of uric acid but as now she is not taking this drug and also taking medicines to reduce uric acid level she should improve rapidly if it is drug induced.
Please take care of diet, and any vitamin supplements that are given to her.
Duration of Tuberculosis therapy depends on site of infection and severity and also on there is no default in taking drug and the organisms are not drug resistant.
Usual duration is 6 to 8 months, but can vary if extra lung (Pulmonary) involvement is there.
Please continue to take treatment regularly hope that she recovers fast.
Dr.Akhilesh Dubey M.D.