Norepinephrine and epinephrine have a lot in common. Learn more about the differences between the two, their pros, cons, and benefits, and how they may affect health.

Epinephrine and norepinephrine sound alike, and they also share many of the same functions. Learn more about these two hormones and neurotransmitters, including the differences between them.

Epinephrine and norepinephrine are chemical messengers that play an important role in the body’s fight or flight response. Although these two chemicals are similar, they act on different parts ...

Medically reviewed by Erika Prouty, PharmD Epinephrine and norepinephrine are naturally made in the body, where they're best known for activating the fight-or-flight response to stress. They both ...

Norepinephrine is a natural chemical in the body that's released by stress during the fight-or-flight response. ... What Is Epinephrine? Medically Reviewed by Allison Buttarazzi, MD | September 24 ...

Norepinephrine is chemically extremely similar to dopamine, ... adrenaline (also known as epinephrine). Adrenaline, the body’s fight-or-flight hormone, ...

The neurotransmitters used by the sympathetic nervous system are acetylcholine, epinephrine, and norepinephrine. Acetylcholine. Acetylcholine is a neurotransmitter that plays a role in regulating ...

Epinephrine and norepinephrine can cause the smooth muscles in certain blood vessels to contract, narrowing the opening and reducing the space through which blood can flow. The result is increased ...

Mechanism of Action. Beta-blockers antagonize beta-1 and beta-2 receptors which are the usual targets of the sympathetic nervous system, including epinephrine and norepinephrine.