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.
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But you can stop a cold sore in its tracks with these products and treatments. the drill: an itchy, tingling sensation that turns into an unsightly blister within hours.
Cold sores are caused by the herpes simplex virus (HSV).. and you suspect you have contaminated them, it is probably best to throw them away.. If you use an antiviral cream as soon as symptoms start then the cold sore may not last as .
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