How to use Zovirax Duo
Zovirax Duo is clinically proven to help prevent blisters when used early1
Zovirax Duo is a breakthrough cold sore treatment. It’s clinically proven to help prevent a cold sore blister when applied at the first tingle and speed up healing time if the blister develops.
![woman touching cold sore on lip woman touching cold sore on lip](https://i-cf65.ch-static.com/content/dam/cf-consumer-healthcare/zovirax/en_us/products/How-to-use-zovirax-cream.png?auto=format)
![Zovirax Video about cold sore cream in action Zovirax Video about cold sore cream in action](https://i-cf65.ch-static.com/content/dam/cf-consumer-healthcare/zovirax/en_us/products/How-to-use-zovirax-at_work.png?auto=format)
Zovirax Cold Sore Cream in action
See how Zovirax Cold Sore Cream gets to the core of your cold sore to inhibit the multiplication of the virus.
![Zovirax Video about cold sore cream in action Zovirax Video about cold sore cream in action](https://i-cf65.ch-static.com/content/dam/cf-consumer-healthcare/zovirax/en_us/products/How-to-use-zovirax-at-work-mobile.png?auto=format)
Reference:
1. Spruance SL, Stewart JC, Freeman DJ et al. Early application of topical idoxuridine in dimethyl sulfoxide shortens the course of herpes simplex labialis: a multicenter placebo-controlled trial. J Infect Dis. 1990; 161 (2 ): 191-7.