hi Dr my dad was on treatment of TB and after the proper medication , his TB was ruled out. Since last few days, he is having irritation in his throat , that is causing him to cough . He is taking zerotuss as a syrup and has a bit relief also. Just wanna to knw, is it a normal cough or there is need to visit some TB specialist agai. My dad was a chronic smoker three years ago, but now its limited to one cigratte a week