i have been messing around a bit recently with raising dopamine/norepinephrine and i have gotten some strange results.
first off with wellbutrin. within the first few days i noticed i got stronger and longer morning erections, but no noticeable impact on libido. but i had to discontinue it within a week because i was gettin these really weird spasms in my prostate area and my prostate felt really weak. also i was getting retrogade ejaculation and my ejaculate was really weak, so im thinking it must have affected my prostate in some way, but im not sure how.
secondly, im now on vyvanse. vyvanse definitely raises sensetivity in that area, but it also acts as a vasoconstrictor so for 6 hours or so after i take my 30mg dose, its hard to get it up and keep it up. but after about 12 hours i notice that i can keep my erections up much longer without the need for manual stimulation. only problem is, i just cannot get it up to thoughts, it has to be stimulation, and it really doesnt raise my libido, just gives me longer lasting/harder erections.
so to put it simple, vyvanse and wellbutrin (raise dopamine/norepinephrine) do not raise my sex drive, but they give me better morning wood and longer lasting and harder erections.
im still quite disappointed however that i cannot get it up to thoughts or visual stimuli like before.