They often shorten the time it takes a cold sore to heal. But they work best if you put them on at the very first sign of an outbreak. Docosanol cream is available over the counter. Acyclovir (Zovirax) cream and penciclovir (Denavir) cream are available by prescription.
Cold sores are common and usually clear up on their own within 10 days.. can help; Things you can try; When to get medical help; Treatment from a GP; Causes. It can lead to neonatal herpes, which is very dangerous to newborn babies.
. of viruses. Find diagnosis, prevention and treatment info at Colgate.com.. Cold sores and fever blisters are caused by herpes simplex virus type 1 (HSV-1).