title: Physical dependence-producing properties of tetrapeptide acylhydrazide analogs of enkephalin in rats.
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects; D004745:Enkephalins / Q000494:pharmacology*; D006801:Humans; D008297:Male; D009020:Morphine / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D010423:Pentazocine / Q000494:pharmacology; D051381:Rats; D013375:Substance Withdrawal Syndrome / Q000523:psychology; D019966:Substance-Related Disorders / Q000209:etiology* / Q000523:psychology
chemical_list: D004745:Enkephalins; D009270:Naloxone; D009020:Morphine; D010423:Pentazocine