herpes simplex
"I was prescribed this medication a few months ago and I absolutely love it.  Whenever I feel a cold sore coming on, I take three 400mg tablets every 8 hours (the recommended dose by my doctor) and it stops the cold sore right in its tracks.

If I'm lucky, I catch the cold sore in the tingling stage and immediently take the pills, and that usually stops the cold sore from breaking out. If I do end up getting a cold sore, I keep using the pills and it Speeds up the process and stops the cold sore from growing any bigger. This medication is amazing and I am so glad to finally have found something that actually works, as I am almost 20 years old and have been suffering from cold sores since age 4."