Acyclovir
cold sores
"Skip the Abreva and ask your doctor to prescribe a bottle of this stuff instead. It's the only thing that really works. I rarely get BAD cold sores, but I just got hit with a really terrible one. Came on so fast I barely had time to take this pill in time. I've read that Acyclovir only works if you haven't blistered yet, which had already happened. IT STILL WORKED PRETTY WELL. It definitely changed how the cold sore is healing. It went straight from "puffing" up into a blister, to scabbing over. It also seems to be reducing the redness and swelling. I'm taking it 3x daily in conjunction with L-Lysine, and occasionally dabbing the cold sore with alcohol to dry it up. Overall, really happy with this medication."