How Do You Know If You Have Low Norepinephrine?

How Do You Know If You Have Low Norepinephrine? Low levels can cause lethargy (lack of energy), lack of concentration, attention deficit hyperactivity disorder (ADHD), and possibly depression. Some anti-depressant medications affect norepinephrine levels in the brain. What happens when you have low levels of norepinephrine? Low levels can cause lethargy (lack of energy), lack