I have answered this above.
There are not drugs to treat this if the cause is not known.
In fact, most causes are not reversible.
It is not thought that your drug use would be permanent.
Conventional medicine, nor urology, have a good answer for you, as your own doctors do not.
I would suggest you move to none conventional medicine.
Specifically: I have treated this type of disorder in my integrative practice with good , TCM/Acupuncture.
That is, Traditional Chinese Medicine and Acupuncture.
In addition, since nerve damage can be from Diabetes, that needs to be controlled very well.
I have seen "incurable" nerve disorders reversed in this fashion.
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