I had a radical prostatectomy in July 2018 and ED
Increase in Testosterone level does help to improve sexual desire .
Thanks for query .
Based on the facts that you have posted you have undergone Radical Prostatectomy for cancer of the prostate and since then facing problem of sexual dysfunction and loss of libido .
Testosterone is considered to be a fuel for sexual desire of a man hence it is but normal to have loss of libido (Sex desire ) after surgery of Radical Prostatectomy for few months till the time when testosterone levels reach to normal levels (6-18 months ).
Following few factors cause reduction in testosterone levels and sex desire after surgery of prostate
1)Anxiety and Emotion after being diagnosed to have Cancer
2)Depression that comes after major surgery and having cancer
4)Loss of ejaculation
5)Decrease in size of penis (common) after surgery of Prostate..
In majority of patients it takes 12-18 months for these sexual dysfunctions to return to normal .
Hope I have answered your query ,please feel free to ask if you have more questions,I shall be happy to help you
Thanks and Regards.