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 How effective is valacyclovir? How does valacyclovir work? How long does it take to get valacyclovir? Can an outbreak be prevented? How soon will my cold sores disappear?
