herpes simplex
"When I apply Abreva at the very first tingle, it drastically reduces the amount that the cold sore grows to, and reduces my healing time in half. (Without Abreva, my cold sores usually last about 2 weeks from initial tingle to completely healed, and with Abreva only one week.)
I get twice yearly outbreaks. Abreva would be more worth it if it were not so over priced."