Viagra caused my severe tinnitus, and I'm not the only victim of this drug.
Before I took it (I was pressured by an abusive narcissistic ex) - I had googled the side effects and saw hearing loss and tinnitus, but just like you, I thought "well, that's just a few cases given the number of people who take it". Next thing that happens is a severe suicidal tinnitus (zero tinnitus and hearing problems before that).
There are so many natural alternatives that work for ED long term.
Psychologically, an ED drug will not build your confidence, it will do exactly the opposite - so your problem will grow even bigger. I guarantee you that.
I'd say, if someone wants risking getting severe tinnitus, a stroke or even go blind, they should go ahead and take this toxic poison.
Please don't come near these drugs, it's not a life threatening situation where such risks are acceptable.
Consult with a knowledgeable herbalist on the alternatives, that'd both help you long term and not cause any side effects.