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Which is the most effective cream between acyclovir, penciclovir, and docosanol for cold sores?

According to studies consulted, penciclovir is considered to be at least as effective as acyclovir in quickly healing oral lesions related to herpes. Penciclovir may even be slightly faster in some cases. However, there is no study comparing docosanol to the other two products, but based on patient experiences, it is possible that docosanol may be less effective.