Canna~Fangled Abstracts Effects of the cannabinoid CB1-receptor neutral antagonist AM4113 and antagonist/inverse agonist rimonabant on fentanyl discrimination in male rats Drug Alcohol Depend. 2022 Sep 26;240:109646. doi: 10.1016/j.drugalcdep.2022.109646. Online ahead of print. Dalal AlKhelb 1, Andre Kirunda 2, Thanh…Freedom WaresSeptember 26, 2022