#adrenaline

• Adrenaline — A hormone secreted by the adrenal medulla and a neurotransmitter released by the sympathetic nervous system during stress, fear, or intense physical effort; epinephrine. It acts rapidly on adrenergic receptors, causing an increased heart rate, peripheral vasoconstriction, dilation of the airways, and mobilization of glucose reserves, preparing the body for the 'fight or flight' response. Figuratively, it describes a state of intense excitement.
• Antiadrenergic — Blocking, inhibiting, or diminishing the effects of adrenaline and noradrenaline on adrenergic receptors within the sympathetic nervous system. In medical practice, it refers to a class of medications (sympatholytics), such as alpha-blockers and beta-blockers, used to treat hypertension and cardiac arrhythmias.