cold sores
"Valtrex works. Around Christmas I got a cold sore and didn't have any on hand and wasn't able to get any - and that cold sore was the worst I've had in ages. It lasted a good 10 days and was huge. I've always taken Valtrex as soon as I feel one coming on, and it has always knocked it out almost immediately. It stops it in its tracks and the healing begins. The difference between using Valtrex and not using it, in my experience, is night and day. I highly recommend always having it on hand. 2 grams for the first dose, then 2 grams 12 hours later has always worked for me."