Valacyclovir
"I get cold sores about 1-3 times a year. When I get them, they are usually REALLY bad. I will not go out in public because my lip is the size of a grape for a week. I started feeling a tingle on my lip around 1pm yesterday afternoon and I immediately started to panic. I had a final presentation for a college class the next day at 3pm and I did not want to have to do it with my lip the size of a grape. I did not take my first dose (2 pills) of valacyclovir until 6pm. By this time, blisters were already forming and my lip was swollen. I took my second dosage at 6am the next morning. it is currently 10am and my lip already looks so much better. Swelling is down,a small scab has already formed. It is hardly noticeable. This stuff works wonders!"