3 doctors weighed in:

How long are cold sores contagious after taking valtrex (valacyclovir)?

3 doctors weighed in
Dr. Nick Debnath
ENT - Head & Neck Surgery
2 doctors agree

In brief: As long as sore is

...Visible.
Cold sores are contagious at all stages from the tingling stage to the weeping stage to the scabbing and healing stage. They are most contagious at the weeping stage when fluid comes out. Valtrex (valacyclovir) may shorten the duration of infection, but if the sores are still healing they are contagious.

In brief: As long as sore is

...Visible.
Cold sores are contagious at all stages from the tingling stage to the weeping stage to the scabbing and healing stage. They are most contagious at the weeping stage when fluid comes out. Valtrex (valacyclovir) may shorten the duration of infection, but if the sores are still healing they are contagious.
Thank
Get help from a real doctor now
Dr. Adam Levy
Board Certified, Obstetrics & Gynecology
35 years in practice
1M people helped
Continue
111,000 doctors available