I have found enough stories of success with all of these (trialed as separate interventions) that I decided to try them out over the past 6-12 months.
Ginkgo - didn’t help
Cistanche - Caused E2 to rise. No benefit.
Inositol - didn’t help
Nystatin (5m IUs per day) - seems to help nocturnal erections a decent amount. but not quit enough benefit to continue.
Alprostadil / Tri-Mix - (injection into penis) some pain from the alprostadil (caverject). Erection not full, but never went to higher doses. Pain in perineum/pelvic floor.
Bi-Mix - At higher doses (nearly an entire CC injected into penis - Dr can concentrate it more to use lower amount) I can gain a decent erection within 5-10 minutes good enough for sex. The erection is good, but feels more fake than when using Viagra. No side effects like Viagra, but my penis can feel a little tender afterwards (not bad). I don’t plan on injecting into my penis multiple times a week for the rest of my life so I am done trialing this. Dr did a dopller ultrasound after injecting BiMix as well and it showed my penis was letting blood flow out still (veneous leakage).