A 19-year-old university student presents with painful blisters on the lips and tingling sensation. This is her third episode this year. What is the most appropriate treatment?

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Multiple Choice

A 19-year-old university student presents with painful blisters on the lips and tingling sensation. This is her third episode this year. What is the most appropriate treatment?

Explanation:
Penciclovir cream is the preferred option for a mild, recurrent herpes simplex labialis (cold sore) in a healthy young adult when started at the first signs (prodrome) or at onset. It delivers high local concentrations of antiviral right at the lesion, shortening healing time and reducing pain when used early. Penciclovir works by being activated in infected cells to inhibit viral DNA polymerase, limiting HSV replication at the site of the outbreak with minimal systemic exposure. Systemic antivirals (aciclovir, valaciclovir, famciclovir) are typically reserved for more extensive disease, frequent or refractory outbreaks, or immunocompromised patients, so for a localized recurrent lip lesion in this patient, topical penciclovir is most appropriate. If needed, start at prodrome for best effect and continue as directed for several days.

Penciclovir cream is the preferred option for a mild, recurrent herpes simplex labialis (cold sore) in a healthy young adult when started at the first signs (prodrome) or at onset. It delivers high local concentrations of antiviral right at the lesion, shortening healing time and reducing pain when used early. Penciclovir works by being activated in infected cells to inhibit viral DNA polymerase, limiting HSV replication at the site of the outbreak with minimal systemic exposure. Systemic antivirals (aciclovir, valaciclovir, famciclovir) are typically reserved for more extensive disease, frequent or refractory outbreaks, or immunocompromised patients, so for a localized recurrent lip lesion in this patient, topical penciclovir is most appropriate. If needed, start at prodrome for best effect and continue as directed for several days.

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