A supraclinical dose of tramadol stereoselectively attenuates endothelium-dependent relaxation in isolated rat aorta.


Tramadol, a combination of R(-) and S(+) enantiomers, inhibits both the acetylcholine-mediated response of muscarinic receptors and the muscarine-induced accumulation of cyclic guanosine monophosphate. Our goals in this in vitro study were to investigate the effects of tramadol on endothelium-dependent relaxation induced by acetylcholine, to determine… (More)


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