KIRANPREET KAUR; HARINDER SINGH; HARDEEP SINGH MANN; ANJLEEN KAUR; PRABHSIMRAN SINGH. A comparative study of efficacy and safety of tramadol in male versus female patients suffering from pain. International Journal of Research in Pharmacology & Pharmacotherapeutics, v. 4, n. 1, p. 106-112, 19 Apr. 2021.