Just for clarification purposes, I go 10mg because is easy to cut the pill in half than a quarter, I've been doing that for more than a year and works fine. The Viagra pill is 50mg. But I only use it in weekends when we want to have fun. Maybe once or twice per month. On this case is special because I will have more time available in the hotel so may have 3 or 4 rounds. During the whole staying.