Here in the states you can get at topical called Abreva at Target, Wal-Greens, CVS, Walmart, etc. http://www.abreva.com/. The retail price is about $15. I get cold sores a few times a year, and as soon as I feel one coming on, I start the Abreva. It works wonders for me! Usually, it stays very small and lasts for maybe four days, as opposed to getting pencil-eraser size and lasting for 7-10 days.