Inclusion Criteria:  Patient completed an outpatient course of standard first line anti-tuberculosis therapy and declared as cured  Exclusion Criteria:  Smoker (to avoid spirometry biases). Extrapulmonary tuberculosis cases Multidrug resistant tuberculosis known contraindications to spirometry testing Individuals with chest wall deformities or neuromuscular diseases Patients who failed to achieve acceptability and reproducibility criteria of the spirometry test Defaulter cases or irregular treatment, known coexisting chronic lung disease as history of asthma or interstitial lung diseases A history of illicit drug use Patients with comorbidities: renal and hepatic insufficiency, heart diseases and metabolic disorders.