How often do I have to take valacyclovir? November 04, 2019 22:17 To treat a cold sore outbreak, you can take 2000 mg (2 tablets) valacyclovir twice a day for one day. Related articles Can an outbreak be prevented? How effective is valacyclovir? How soon will my cold sores disappear? How does valacyclovir work? What cold sore treatment does Alpha Medical have?
