I was also put on 5mg of Tadalafil (Cialis) for a month prior and a year after just as an insurance policy along with L Citralline supplements. I don't think I need either but I'm going to do as the doctor ordered. I think Tadalafil is the gold standard for this and Viagra is the alternative and seems to be used more for when you want to get busy but the 5mg isn't doing it for you, and those "get busy" doses of either are like 20+mg for that.