Definition of Adrenaline

1. Premenstrual Syndrome (PMS) Slideshow Pictures
2. Disease Prevention in Women Slideshow Pictures
3. Happiness Quiz: Test Your Emotional Intelligence Quotient (EQ)

Adrenaline: A stress hormone produced within the adrenal gland that quickens the heart beat, strengthens the force of the heart's contraction, and opens up the bronchioles in the lungs, among other effects. The secretion of adrenaline is part of the human 'fight or flight' response to fear, panic, or perceived threat. Also known as epinephrine.

Need help identifying pills and medications?
Use the pill finder tool on RxList.