IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-6-35685 Original Research Paper A Randomized, Controlled trial of the Efficacy and Safety of Tramadol versus Tapentadol in Acute osteoarthritic Knee pain Rakesh Roshan Dr. Dr. Dinesh Kumar Dr. June 2021 10 6 01 02