Elsherbiny, S., Zain Abdelhak, A. and Mostafa Ismail, O. 2022. Analgesic Efficacy of Pre-Operative Oral Pregabalin in Dacryocystorhinostomy Surgery. International Journal of Medical Science and Clinical Research Studies . 2, 07 (Jul. 2022), 631–637. DOI:https://doi.org/10.47191/ijmscrs/v2-i7-07.