Valacyclovir
"Where to begin...I have had cold sores for life. All year round, at least a few each month. Parents told me I have suffered from them when I was only 10 days old. They took me multiple times to emerge due the overwhelming appearance that you can imagine on an infant face. Growing up it never got easier. I had multiple blistering cold sores all around my mouth and also all around my nose even in my nose. There are many things that would trigger it such as stress, fever, dehydration. My skin was very sensitive to the point that when the dentist used to stretch my mouth to clean it I would get it. I have tried everything possible and only Valtrex worked for me. Now when I get it, it's once in a blue moon (when I'm dehydrated)."