I have used zovirax in both my pregnancies. I have had 2 this pregancy and zovirax is the only thing that keeps mine under control. One of the worst thing about coldsores are the moisture they pull from your lips I have the worst dried lips at the moment from the last one. I am thankful though that my babies are exposed to the virus whilst pregnant as I have found that after the birth I get due to all the emotions and being a little run down. Hope it's dried up and you are on the mend.