Acyclovir
"I started getting cold sores about 2 years ago. I have tried everything...rubbing alcohol, hydrogen peroxide, nail polish remover, L-Lysine, bactine, abreva, ice, biotin...you name it and I've tried it. Nothing worked for me. Finally I sucked it up and went to a doctor about it and was prescribed acylvoir. I don't get any kind of tingle, so at the very first sign of a bump, I take 2 400mg pills, and then about 2 hours later I take 2 more. Within hours the bump is gone. This drug is a miracle!"