adrenaline (epinephrine)

Adrenaline, also known as epinephrine, is a hormone produced by your adrenal glands in response to stress or danger. It prepares your body for a "fight-or-flight" reaction by increasing heart rate, expanding airways for better breathing, and boosting blood flow to muscles. This helps you react quickly and effectively in challenging situations. Adrenaline also briefly increases blood sugar levels for energy. After the threat passes, its effects decrease, helping your body return to normal. It plays a critical role in emergency responses, as well as in medical treatments for severe allergic reactions and cardiac emergencies.