Open Access Research Paper Views (949) In vivo antinociceptive potential of ethanolic extract of leave, catkin and cone of Alnus nitida (Spach.) Endl. Nagina, Muhammad Ibrar Int. J. Biosci. 13(4), 256-261, October 2018. DOI: http://dx.doi.org/10.12692/ijb/13.4.256-261 Keywords: Acetic acid induced writhing, Extract, Inflammatory mediators, Pain Details