If you would check the difference between epinephrine and norepinephrine, you might get a little bit confused because they sound very similar. You need to know that they are different from each other. When you say epinephrine, this is something that you can have that will have more effect on your heart.
When you say norepinephrine, this is something that will have more effect on your blood vessels. Take note that both of these will have an effect on your body overall.
It will teach your body whether they should fight or flight when it comes to the amount of stress that you are receiving because of the things that you are going through.