ChEBI: (R)-adrenaline is the R-enantiomer of adrenaline. It is a hormone secreted by the adrenal glands resulting in the 'fight-or-flight' response. It has a role as a hormone, an adrenergic agonist, a vasodilator agent, an alpha-adrenergic agonist, a bronchodilator agent, a vasoconstrictor agent, a beta-adrenergic agonist, a sympathomimetic agent, a mydriatic agent and a mouse metabolite. It is a conjugate base of a (R)-adrenaline(1+). It is an enantiomer of a (S)-adrenaline.