The OP should know that Phil and I have an ongoing divergence of opinion on this issue, covered at length in other threads. The 110 mg TC/week gives an average of 11 mg testosterone per day, which is more than all but a very small fraction of men could make naturally. It defies common sense to say that taking around double average natural testosterone production puts the average man "in a mid–upper normal physiological range
", unless you are measuring at a weekly trough and ignoring what goes on the rest of the week
. The dose is certainly not conservative, and it could only be considered somewhat reasonable if lower doses had been tried first without success, after being given ample time to work.
Going by forum reports, a reduction in sensitivity is not a rare side effect of TRT. The reports thus far link it to the dose size, the suppression of the HPTA and the unnatural patterns of testosterone absorption.The lucky ones see improvements with only dose reductions, as seen in the quote above. I had to address all three issues in order to resolve this problem. By the way, I have also experimented with cabergoline in the past. It gave some minor and inconsistent benefits, but basically was just increasing complexity—the original treatment causes side effects, but rather than tackling the underlying issues you treat the side effects with additional treatments that offer their own side effects. Another example is using an aromatase inhibitor to counteract symptoms of high estradiol, when the high estradiol was simply a result of too much testosterone.
Some comments by AI on how testosterone that's high compared to our normal physiology affects dopamine signaling:
Chronic supraphysiological (or "excessive-for-the-individual") testosterone levels can initially enhance dopamine signaling in reward-related brain pathways but often lead to adaptive changes that blunt or alter it over time. This provides a plausible neurobiological mechanism for the commonly reported "honeymoon period" on TRT—where men feel euphoric, motivated, energetic, and improved in mood/libido shortly after starting higher-than-natural doses—followed by a return to baseline mood/motivation or even worse symptoms.