#epinephrine

• 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.
• Anaphylactic — Pertaining to anaphylaxis; triggering, accompanying, or characterizing an acute, systemic, and potentially lethal allergic reaction, structurally initiated by the massive and abrupt release of chemical mediators (such as histamine) from mast cells and basophils following an antigen-antibody immunological conflict. In a clinical sense, it defines severe manifestations characterized by a collapse in blood pressure and asphyxiation.
• Anaphylaxis — A state of acute, systemic, and violent allergic hypersensitivity of the body, structurally occurring upon the introduction of a foreign substance (antigen) to which the body was previously sensitized. This severe immunological phenomenon involves massive mast cell degranulation and can rapidly progress to circulatory shock, obstructive laryngeal edema, and cardio-respiratory arrest, requiring immediate emergency medical care.
• Auto-injector — A pre-filled medical device equipped with an automated spring-loaded mechanism, designed to allow patients or untrained personnel to rapidly self-administer a precise, pre-measured dose of medication via intramuscular or subcutaneous injection. It is primarily utilized in critical emergencies, such as administering epinephrine for anaphylactic shock or antidotes following exposure to nerve agents.