[Effects of loperamide on the motility of the isolated intestine in guinea pigs, rats and dogs (author's transl)].
Effects of Loperamide on the motility of the isolated intestine in guinea-pigs, puppies and rats were examined. The spontaneous contractions of the small intestine and colon in puppies were inhibited at relatively high concentration of the agent (10(-5) g/ml). The peristaltic reflex in the guinea-pig ileum was slightly inhibited at concentrations of 10(-8) to 10(-7) g/ml, and was completely abolished at 10(-6) g/ml. The agent (2X10(-7) g/ml) inhibited the longitudinal contraction of the guinea-pig ileum elicited by transmural electric stimulation. The agent (10(-5) g/ml) inhibited the acetylcholine-induced contraction of the colon and small intestine in puppies, and induced the hyperpolarization of the membrane potential and the abolition of spike potentials of the intestinal muscle in rats.
D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D003106:Colon / Q000502:physiology; D004285:Dogs; D005769:Gastrointestinal Motility / Q000187:drug effects*; D006168:Guinea Pigs; D007082:Ileum / Q000502:physiology; D066298:In Vitro Techniques; D007421:Intestine, Small / Q000502:physiology; D008139:Loperamide / Q000494:pharmacology*; D008564:Membrane Potentials / Q000187:drug effects; D010880:Piperidines / Q000494:pharmacology*; D051381:Rats
D010880:Piperidines; D008139:Loperamide