Generic Name: Penciclovir

  • What is this medication and its most common uses?

    Denavir is a topical medicine (applied directly on the skin) used to treat cold sores.

  • What should I know when beginning and continuing on this medication?

    How does this medication work?

    Denavir works by lowering the ability of the virus to multiply in your body, thereby reducing your symptoms.

    What are the beneficial effects of this medication and when should I begin to have results?

    What: Denavir has been shown to help your lesions heal faster.

    When: Everyone responds differently to treatment, so try to be patient and follow your healthcare provider's directions. It is important that you use Denavir exactly as your healthcare provider has prescribed.

    How do I know it is working?

    You may start to notice an improvement in your symptoms after you start using Denavir. This is a good indicator that your medication is working. Your healthcare provider may ask you questions and order tests to assess how well your infection is being treated.

  • What are the possible side effects of this medication?

    The following is not a full list of side effects. Side effects cannot be anticipated. If any develop or change in intensity, tell your healthcare provider as soon as possible. Only your healthcare provider can determine if it is safe for you to continue taking this medication.

    More common side effects may include: skin reactions.

  • Who should not take this medication?

    Do not use Denavir if you are allergic to it or any of its ingredients.

  • What should I tell my healthcare provider before I take the first dose of this medication?

    Tell your healthcare provider about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Denavir. Also, talk to your healthcare provider about your complete medical history.

  • What is the usual dosage?

    The information below is based on the dosage guidelines your healthcare provider uses. Depending on your condition and medical history, your healthcare provider may prescribe a different regimen. Do not change the dosage or stop taking your medication without your healthcare provider's approval.

    Adults and adolescents ≥12 years: Apply to the affected area(s) every 2 hours while you are awake for 4 days.

  • How should I take this medication?

    Apply Denavir exactly as prescribed by your healthcare provider. Do not change your dose or stop using Denavir without first talking to your healthcare provider.

    Wash your hands before and after applying Denavir.

    Start treatment as early as possible, when your lesions or symptoms appear.

  • What should I avoid while taking this medication?

    Do not use Denavir in or near your eyes.

  • What are the possible food and drug interactions associated with this medication?

    No significant interactions have been reported with Denavir at this time. However, always tell your healthcare provider about any medicines you take, including over-the-counter medications, vitamins, and herbal supplements.

  • May I receive this medication if I am pregnant or breastfeeding?

    The effects of Denavir during pregnancy and breastfeeding are unknown. Do not breastfeed while you are using Denavir. Tell your healthcare provider immediately if you are pregnant, plan to become pregnant, or are breastfeeding.

  • What should I do if I miss a dose of this medication?

    If you miss a dose of Denavir, apply it as soon as you remember. However, if it is almost time for your next dose, skip the one you missed and return to your regular dosing schedule. Do not apply two doses at once.

  • How should I store this medication?

    Store at room temperature.

Meet the Pharmacists

I'm Kristen Dore, PharmD. Welcome to PDR Health!

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