Acyclovir
"I suddenly keep getn these horrible cold sores like I was slit with a razor outside in like half inch splits that sting so bad n a couple times I've gotten a single sore down unda that hurts n is red. I go as long as I can bare it n sometimes it goes away on its own quickly but wen It doesn't I take one of my sisters acyclovir's a day n 9times outa 10 it goes away within a few days. I now take lysine with my daily vitamins. U cant just take vitamins wen u need em u gota take em daily so wen u get sick or watever they've already built up in ur system. I skipped a few days last week n i already got 2cold sores. Abreva only works if u use it at the 1st sign of a cold sore, once the sores there it will not work n that's a big waist of money"