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A 42-year-old member asked:

How long does it take for zovirax (acyclovir) to work? help please

1 doctor answer1 doctor weighed in
Dr. Simon Tsiouris
Infectious Disease 23 years experience
Slowly: Zovirax (acyclovir) will only speed up the healing of a cold sore by a day or two compared to how long it would have taken to heal without zovirax (acyclovir). Healing will take 4-5 days instead of 5-6 days.

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Last updated Feb 23, 2018

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