
Originally Posted by
gdevine
When total testosterone is supraphysiologic, at lets say over 1000 ng/dl, men will experience problems with libido, erection quality and poor orgasm intensity.
Testosterone increases Dopamine in the brain and we hear men all the time who were once hypogonadal say that when they started their TRT protocols they "never felt better in years and their libido is through the roof"!
So, testosterone replacement in hypogonadal men initially will increase sex drive, reduces depression and gives pleasure to many activities. But it's short lived unfortunately as the brain (Dopamine receptors) settles down to the now normal physiological Dopamine levels
The problem is that Dopamine is a very fragile neurotransmitter/hormone in its effect on the brain.
Too high a Dopamine level for sustained periods of time can cause a tolerance or "numbing" to Dopamine. This is not too dissimilar to how people develop tolerance to drugs like cocaine and amphetamines which increase Dopamine levels in the brain to cause their "high" if you will.
This can lead to the loss of libido, ability to maintain an erection and lower orgasm intensity when high testosterone levels are maintained for long periods of time.
This is just one of many things that come to mind when we talk about sustained elevated levels of Testosterone in men.