title: Opioid receptors in human placenta may be affected by methadone and propoxyphene treatment.
mesh_terms: D003496:Cyclazocine / Q000031:analogs & derivatives / Q000378:metabolism; D011431:Dextropropoxyphene / Q000494:pharmacology*; D016314:Ethylketocyclazocine; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D008691:Methadone / Q000494:pharmacology*; D010920:Placenta / Q000187:drug effects*; D011247:Pregnancy; D011957:Receptors, Opioid / Q000187:drug effects*; D019966:Substance-Related Disorders
chemical_list: D011957:Receptors, Opioid; D016314:Ethylketocyclazocine; D003496:Cyclazocine; D011431:Dextropropoxyphene; D008691:Methadone