In all probability your acne
is drug induced. So once the antitubercular therapy is stopped either it will clear on its own or you might require few anti acne medicines to have a clean face. Tuberculosis
being more serious condition than acne, it is imperative that you take your anti tubercular medicines regularly even at the cost of having temporary skin flaws. There is no harm in starting an anti acne medication along with antitubercular drugs as it will definitely improve your skin. However a proper analysis of your skin is required to ascertain the severity of acne, so that treatment can be started likewise. Hence, you need to consult a dermatologist
nearby. Take care.