Cold sores clear up without treatment in two to four weeks generally. Some prescription antiviral drugs
may speed the healing process. Examples include:
- Acyclovir (Xerese, Zovirax)
- Famciclovir (Famvir)
- Penciclovir (Denavir)
- Valacyclovir (Valtrex)
In general, the pills of these products work better than the creams. For very severe infections, some antiviral drugs can be given with an injection.
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