title: Morphine and nalorphine impair neuromuscular transmission.
mesh_terms: D000818:Animals; D001001:Anura; D003864:Depression, Chemical; D004558:Electric Stimulation; D066298:In Vitro Techniques; D008564:Membrane Potentials / Q000187:drug effects; D009020:Morphine / Q000494:pharmacology*; D009119:Muscle Contraction; D009269:Nalorphine / Q000494:pharmacology*; D009469:Neuromuscular Junction / Q000187:drug effects* / Q000502:physiology; D012584:Sciatic Nerve; D009435:Synaptic Transmission / Q000187:drug effects*
chemical_list: D009020:Morphine; D009269:Nalorphine