I've used Viagra & similar generics since ten years ago. The effect seems to have worn off. So, with brand Viagra again, all I get is a soft, willy-nilly erection & a premature ejaculation. My Dr. is understanding but leaves it to me to decide what to do next. He said I could try Cialis. I hesitated, since it has a long effect, like 36 hrs., as they say. To me Viagra's effect shows in 30 minutes & wears off in an hour. Nowhere near what they say as 4 hrs. I don't know about Cialis.
I very much appreciate if someone shares their experience, including the dose the've used. Thank you.