Start with a low dose, like 20mg, that stuff gave me high-pitched tinnitus out of the blue one night after a 60mg dose.
Effortless erections are awesome, but not at the expense of a 24/7, 13k hiss in your head!
Thankfully it subsides eventually, but it can take weeks. I've been through it twice now in the last 10 months, and am backing WAY off on that stuff. It's just not worth it...