Welcome to HCM.
Based on the information provided, your father has recurrent attacks of Tuberculosis
. Recurrent Tb is seen in people with compromised immunity like malnutrition
, malignancy, HIV, diabetes
, treatment with steroids and immuno suppresants etc., or due to drug defaulting or Drug resistant TB.
As you have mentioned your father had lung cancer
the possible causes for recurrence in your father's case are malnutrition, malignancy and usage of immunosuppresants( used to treat Malignancy). You have not mentioned what is the type of lung cancr with which your father suffered. So i can not comment on that.
As far as Treatment of TB is concerned AKT4 should work. As it has been just 10 days since the treatment started, please wait for 2 more weeks. If the fever and body pains still persist, then taking Streptomycin
Injections along with AKT4 should help your father. Meanwhile give him good diet and plenty of oral fluids, so that his body is well supported during the course of treatment.
Wait for 2 more weeks and see your doctor again and discuss with him about the above mentioned things and starting streptomycin.
Hope your father recovers soon.