title: Effect of high concentrations of non-steroidal and steroidal antiinflammatory drugs on prostaglandin-induced contractions of the guinea-pig isolated ileum.
abstract: In addition to their well-known effect at low concentrations on prostaglandin synthesis or their release and production, 11 non-steroidal antiinflammatory drugs and 4 antiinflammatory steroids exhibit at high concentrations a direct antagonism on certain prostaglandin actions. This is demonstrated on PGE1- and PGF2alpha-induced contractions of guinea-pig isolated ileum when compared to acetylcholine-induced contractions. This inhibitory effect is totally reversible after washing out the drugs from the organ bath.
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology*; D005260:Female; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects*; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D011448:Prostaglandin Antagonists; D011453:Prostaglandins / Q000494:pharmacology*; D011458:Prostaglandins E / Q000494:pharmacology; D011460:Prostaglandins F / Q000494:pharmacology
chemical_list: D000893:Anti-Inflammatory Agents; D011448:Prostaglandin Antagonists; D011453:Prostaglandins; D011458:Prostaglandins E; D011460:Prostaglandins F