I'm a BIG baby about cold sores, they send me into panic mode! I guess I whined enough to my dermatologist, because he prescribed me a year's supply of Valtrex. Since I don't get them that often I don't take them everyday, just when I think one might be coming on. Which more often than not, is me freaking out over a pimple
Anyhow, they work, very well, I was told to do a dose every 12 hours for the first day that I think one is coming, every day thereafter.
Where I used to get them 3-4x a year I now haven't had one this year. That could also have a lot to do with my healthier eating lifestyle.