Yuvraj Dnyanoba J, U P G. Randomized comparison of efficacy, duration of action, adverse reactions and cost effectiveness of pentazocine and tramadol on relief of post operative pain. IJCRPP [Internet]. 2018 Oct. 20 [cited 2025 Dec. 25];2(3):1-4. Available from: https://www.ijcrpp.com/index.php/ijcrpp/article/view/13