Drug or hormone that aids nerve rejuvenation

Had my six month after RP checkup with the doc, still undetectable.

During the course of review discussing my continued leakage (1 pad night, 1 day - down to 8-10 grams) and ED recovery, I asked if he was aware of a the drug or hormone which aid in nerve recovery.

I read in a post back a couple of months of this drug/hormone which had shown promise in clinical trails. Unfortunately, I did not write down the name. He said he would look into to it if I could provide him with the name.

Does anyone have that info?

Thanks