Tobacco/nicotine and endogenous brain opioids
Keywords: PPE، preproekkephalin; GABA, gamma-aminobutyric acid; DA, dopamine; PPE, preproenkephalin; DMPP, dimethylphenylpiperazinium; POMC, proopiomelanocortin; FNA, funaltrexamine.Analgesia; Endogenous opioids; Nicotine; Reinforcement; Stress; Tobacco