title: Morphine and muscle spasm.
mesh_terms: D000328:Adult; D005704:Gallbladder / Q000187:drug effects; D006801:Humans; D008297:Male; D009020:Morphine / Q000009:adverse effects*; D009128:Muscle Spasticity / Q000139:chemically induced*; D009130:Muscle, Smooth / Q000187:drug effects
chemical_list: D009020:Morphine