It does help me my erections, but since it's only 5mg daily my doctor told me to take 4 tablets (3 extra tablets for a total of 20mg) on the days I want to try having sex. Even when I take 20mg I'm only 65% firmness on a good day, but hopefully it'll keep improving. If not I'll eventually discuss with my doctor what's next to try.

Nope. Don't think 5mg is designed to affect erections. As far as I know, it's to assist with scar tissue. Or something.
Erections are a year away, as I understand.