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A member asked:

When is it too late to apply zovirax (acyclovir) to cold sore?

A doctor has provided 1 answer

Never: It still helps to apply the cream after 4 or 5 days just a lot less. Better to use it at first sign of a cold sore. It may not help much but can't hurt. Oral medications work well if you start at 1st sign.

Dr Villaplana and 3 doctors agreed

Answered 9/28/2016

5.8k views

Thank

Related Questions

A member asked:

What can trigger frequent cold sore once every 2months? some years I get just one/year but since September I get 1 almost every 2-3 months. For the last year I used Zovirax cream almost daily hoping to prevent them.could this made me more sensitive?

A doctor has provided 1 answer

A member asked:

Took zovirax (acyclovir) for 10 days about two weeks ago & my genital sore cleared. now I have another. do I need to take it everyday? was only given for 10 days

A doctor has provided 1 answer

A member asked:

I applied zovirax (acyclovir) cream to my fever sore and vaseline because it was so dried out. I then touched the corner of my eye about an hour or so later.

3 doctors weighed in across 3 answers

A member asked:

What could be causing whitish thread like substances protruding from the skin of parts of my friend every morning and the later on falling off? She thinks that she accidentally transfered herpes from her sore. She is taking zovirax. What could it be?

A doctor has provided 1 answer

A member asked:

Had a cold sore 7 months ago and left a red mark that wont go away. Been applying acyclovir cream nd taking medication everyday. Will this ever go away And is it still contagious?

A doctor has provided 1 answer

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