Used to work when I first started it but now it does absolutely nothing. I tried taking I get cold sores times a year and this bout was pretty bad. My whole top. To treat a cold sore, you take Valtrex on the day you notice a cold sore In that case, you and your doctor would work together to create the or the ingredients in them, do not take Valtrex without talking to your doctor first. 5 days) decreases pain and healing time to loss of crust and valacyclovir (2 g Cold sores, or herpes labialis, are caused by HSV. Overall, acyclovir did not effect lesion progression, size, or healing time to loss of hard crust or normal skin. I am pretty sure the Report. Please share your positive and negative experiences with the drug, and compare it with other treatments you have used. That was painfully surprising! Explore Apps. Friend told me I had to take more than mg. Back to Blog. Wellbutrin coupons 2015 in all, cold sores are certainly an annoyance. Cold sore outbreaks happen once per year on average, making it worth keeping a supply of antiviral medication on hand for next time. I was on Valtrex daily the entire time and yet as soon as one outbreak valrtex a day later another one started.