It's best to start treatment with Zovirax antiviral cream as soon as you feel the tingle, so Zovirax antiviral cream can help stop the virus replication. However, the antiviral properties of Zovirax cream means it is also effective at the blister phase - helping to speed healing compared to no treatment.
At first sign of tingle or blister apply a small amount to the affected area 5 times daily for 4 days.
The earlier you treat a cold sore, the better.
The best time to start treatment is when that tingling sensation first happens, before any visible sign of a cold sore appears. If you miss it, don't worry, it's not too late to treat.
Do not use Zovirax If you are pregnant unless under medical advice
Do not use Zovirax in or near your eyes
Zovirax is for external use only