For External Use Only
Zovirax Ointment is for use on the skin and affected external areas.
Do not get the ointment in your eyes.
If it gets into your eyes, rinse them well with water.
Do not apply it inside your mouth or nose unless your healthcare provider specifically tells you to.
Allergic Reactions
Do not use Zovirax Ointment if you are allergic to acyclovir, valacyclovir, or any ingredient in the ointment.
Seek emergency medical attention if you develop:
- Hives
- Severe rash
- Swelling of the face, lips, tongue, or throat
- Difficulty breathing or swallowing
Pregnancy
Tell your healthcare provider if you are pregnant or planning to become pregnant.
Only a small amount of acyclovir is expected to enter the bloodstream when the ointment is used on the skin.
Your healthcare provider will consider the expected benefits and possible risks before recommending treatment.
Breastfeeding
Tell your healthcare provider if you are breastfeeding.
Systemic absorption from the ointment is low, but avoid applying it directly to the breast or nipple where a nursing infant could come into contact with it.
Skin Irritation
Zovirax Ointment may cause mild irritation at the application site.
Possible effects include:
- Redness
- Dryness
- Itching
- Burning or stinging
- Mild skin irritation
Contact your healthcare provider if these effects become severe or do not improve.
Drug and Topical Product Interactions
Important drug interactions are unlikely because only a small amount of acyclovir is absorbed through the skin.
However, tell your healthcare provider or pharmacist about all prescription medications, over-the-counter products, vitamins, supplements, and topical treatments you use.
Do not apply other creams, ointments, or skin products to the same area unless your healthcare provider says it is safe.
Use in People With Weakened Immune Systems
Zovirax Ointment may be used for certain herpes simplex infections in people with weakened immune systems.
However, these patients may need closer medical supervision because herpes infections can be more severe or harder to treat.
Contact your healthcare provider if the infection spreads, becomes worse, or does not improve.
Kidney Problems
Kidney dose adjustments are usually not needed with Zovirax Ointment because very little acyclovir is absorbed into the bloodstream.
This is different from oral or intravenous acyclovir, which may require dose adjustments in people with kidney impairment.
Avoid Spreading the Virus
Wash your hands before and after applying the ointment.
Avoid touching the lesions more than necessary, and do not share towels, razors, or other personal items that may come into contact with the affected area.
Use Only as Directed
Apply Zovirax Ointment exactly as prescribed.
Do not use more ointment, apply it more often, or continue treatment longer than recommended unless your healthcare provider tells you to.
When to Contact Your Healthcare Provider
Contact your healthcare provider if the lesions become worse, spread to other areas, do not improve after treatment, or you develop severe pain, swelling, fever, or signs of another infection.
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