title: Methods for evaluating effects of opioid peptides in laboratory animals.
mesh_terms: D000700:Analgesics; D000818:Animals; D004353:Drug Evaluation, Preclinical / Q000379:methods; D004723:Endorphins / Q000494:pharmacology*; D004745:Enkephalins / Q000494:pharmacology; D011957:Receptors, Opioid / Q000187:drug effects
chemical_list: D000700:Analgesics; D004723:Endorphins; D004745:Enkephalins; D011957:Receptors, Opioid