%0 Journal Article %T The analgesic interaction of tramadol and morphine in rats: An isobolographic study %J Archive of "Veterinary Research Forum". %D 2019 %R 10.30466/vrf.2010.33108 %K Effective Dose 50 %K Isobolography %K Morphine %K Tail-flick test %K Tramadol %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6522189/