Adrenergic means "working on adrenaline (epinephrine) or noradrenaline (norepinephrine)". * Adrenergic nervous system, a part of autonomic nervous system that uses epinephrine or norepinephrine as its neurotransmitter Regarding proteins: * Adrenergic receptor * Adrenergic transporter Regarding drugs: * Adrenergic receptor agonist * Adrenergic receptor antagonist * Adrenergic reuptake inhibitor