TK, I love my Lysine. I started using it over a year ago when I had a horrible outbreak that had me really depressed. DH went to the chemist and spoke to them at length to try and find something to help me. He came home with Lysine. I used them to clear it up and now only take a tablet if I get the tingle or there is trauma to my mouth (I caused that last one by hitting my lip on my laptop) - I have not had an active coldsore since. More than 12 months cold sore free when before that I had suffered numerous reccurances.

Well well worth trying.