Farooq, U. , Ahmed Tariq, S.M. , Khan, Z.U. , Iqbal Butt, M.U. , Qureshi, A.M. and Tayyeb, M. 2025. Change in 4% lidocaine Instillation in the endotracheal tube (ETT) before and after surgery in patients undergoing surgery under general anesthesia. Biological and Clinical Sciences Research Journal. 6, 10 (Oct. 2025), 14–19. DOI:https://doi.org/10.54112/bcsrj.v6i10.1900.