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“Modulation of the vasoconstrictor or vasodilator tone of the skin blood vessels altered the magnitude of the BF response to electrical stimulation; epinephrine blocked the response and acetylcholine increased the response.”
Medical science monitor : international medical journal of experimental and clinical research • 2007 | View Paper
“However, during the washout of acetylcholine in the presence of epinephrine , the oscillatory potentials and aftercontractions were larger than before acetylcholine, and repetitive activity was often induced.”
“It is concluded that in human atrial fibers acetylcholine has inhibitory as well as excitatory effects that are exaggerated in the presence of epinephrine and are mediated by the activation of the muscarinic receptor.”
“The interaction between acetylcholine and epinephrine involves an antagonism at an intracellular level.”
The American journal of physiology • 1989 | View Paper
“Isoproterenol, epinephrine , and norepinephrine in that order of potency produced concentration-dependent inhibition of comparable responses to EFS and ACh.”
“ Acetylcholine , present in mixtures with epinephrine or norepinephrine in ratios of 1:10 to 1:20, was effective in antagonizing the electrical effects of the latter.”
“The findings described here suggest a possible role of acetylcholine in the frog heart for reducing or preventing large electrical responses to epinephrine and norepinephrine.”
The Journal of pharmacology and experimental therapeutics • 1955 | View Paper
“The vacuolizing effects of acetylcholine are antagonized by atropine, scopolamine and Syntropan, as well as by epinephrine , ephedrine, phenylephrine and Paredrine.”
“RESULTS The injections of various doses of ad enaline de creased the mean regional blood flow and eruption rate dose-dependently, while those of ace tylcholine in creased the mean regional blood flow and eruption rate dose-dependently.”
“Significant correlations (p<0.001) were obtained between the maximum and minimum values in the regional blood flow and in the eruption rate following injections of various doses of adrenaline and acetylcholine.”