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Penciclovir topical

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.





This medication is used for reoccurring herpes (cold sores or fever blisters) in adults.

How To Use

Use as directed, applying a thin layer to the affected area. Use at the first sign of tingling or swelling in the affected area.

Side Effects

At the site of application, mild redness, irritation, rash, or mild numbness may occur. If these continue or are bothersome, notify your doctor. If you notice other effects not listed above, contact your doctor or pharmacist.


Before using this drug, tell your doctor if you have: any allergies. This medication should only be used on sores of the lips and face. Avoid use in or near the eyes, as irritation may occur. Tell your doctor if you are pregnant before using this medication. It is not known whether penciclovir is excreted into human milk after applying it to the skin. Before breast-feeding, discuss with your doctor.

Drug Interactions

Tell your doctor of all nonprescription and prescription medication you may take. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. This medicine may be harmful if swallowed.


This medication is not to be shared with others.

Missed Dose

If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.


Store at or below 86 degrees F (30 degrees C) away from sunlight and moisture. Do not freeze.