Just wanted to post this based on a response to someone who PM'd me. He is taking choline and l-dopa and wanted to know if these increased norepinephrine and what supplements increase norepinephrine.
Choline becomes acetylcholine, which is the primary neurotransmitter for the parasympathetic nervous system, which counterbalances the sympathetic, which has norepinephrine as its primary neurotransmitter -- meaning good acetylcholine levels are helpful in reducing stress by balancing the parasympathetic with the sympathetic. Dopa Bean, OTOH, increases your l-dopa, which is used because it increases dopamine. However, dopamine becomes norepinephrine (and this becomes epinephrine/adrenaline), so there are some people, especially if they take too much, who convert to too much norepinephrine. I wouldn't let it worry you, and if you want try going off the Dopa Bean for a week and see how you feel, getting back on it, etc.
L-tyrosine is another supplement that precedes l-dopa, causing the same potential problem in some people too much NE. Vitamin B6 increases the conversion of l-dopa to dopamine, which again can cause the same thing downstream. Vitamin C and copper both increase the conversion of dopamine to norepinephrine.
Remember that we all need a healthy level of norepinephrine, and people actually can get erections and increases in libido from taking buproprion (Wellbutrin) given that it increases norepinephrine. Orgasms are triggered by norepinephrine release, and a resultant decrease in dopamine, which is one of the main reasons that makes you relaxed after sex. Norepinephrine is also very important for energy. Low levels have also been linked to depersonalization and derealization (which some here might know as a type of "brain fog"), especially in combination with low cortisol and/or poor HPA feedback (i.e., the hypothalamus isn't picking up on the signal of cortisol well).
Just FYI. Norepinephrine and epinephrine are good and necessary within reasonable limits.