<p>Preface<br>Jun-Xu Li<br>1. Interactions between opioids and stimulants: Behavioral pharmacology of abuse-related effects<br>David R. Maguire and Vanessa Minervini<br>2. In vitro and in vivo pharmacology of kratom<br>Takato Hiranita, Samuel Obeng, Abhisheak Sharma, Jenny L. Wilkerson, Christopher R. McCurdy and Lance R. McMahon<br>3. Human behavioral pharmacology of stimulant drugs: An update and narrative review<br>Ashley Strzelecki, Jessica Weafer and William W. Stoops<br>4. Human behavioral pharmacology of psychedelics<br>Justin C. Strickland and Matthew W. Johnson<br>5. Stimulus functions of nicotine<br>Mark G. LeSage<br>6. The incentive amplifying effects of nicotine: Roles in alcohol seeking and consumption<br>Christopher P. King and Paul J. Meyer<br>7. Environmental influence on the preclinical evaluation of substance use disorder therapeutics<br>Matthew L. Banks<br>8. Examining the effects of psychoactive drugs on complex behavioral processes in laboratory animals<br>Brian D. Kangas<br>9. Receptor mechanisms underlying the CNS effects of cannabinoids: Beyond the CB<SUB>1</SUB> receptor<br>Briana Hempel and Zheng-Xiong Xi<br>10. Potential therapeutic targets for the treatment of opioid abuse and pain<br>Norikazu Kiguchi and Mei-Chuan Ko<br>11. Trace amine-associated receptor 1 and drug abuse<br>Ruyan Wu, Jianfeng Liu and Jun-Xu Li<br>12. Substance abuse and neurotransmission<br>Sarah Davis and Jun Zhu</p>