Topical Acyclovir Ointment

Acyclovir 5% | Antiviral Cream for Cold Sores and Herpes Lesions

What is this medication?

Topical acyclovir is an antiviral medication used to treat infections caused by herpes viruses, including herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2), and in some cases varicella-zoster virus. 

This medication is applied directly to the skin and works by stopping the virus from multiplying and spreading, which can help the body control the infection more quickly.

Acyclovir is a synthetic antiviral nucleoside analogue that interferes with viral DNA replication. Once inside infected cells, the drug is converted into its active form, which blocks viral DNA polymerase and prevents the virus from copying its genetic material. 

By slowing viral replication, topical acyclovir may help:

  • Reduce the duration of symptoms

  • Support faster healing of herpes lesions

  • Decrease viral shedding in certain infections

  • Reduce discomfort associated with outbreaks

This medication does not cure herpes infections and does not eliminate the virus from the body. The virus can remain dormant and may reactivate in the future.

This medication should only be used when prescribed by a licensed healthcare provider.

    • Store the medication at 59°F to 77°F (15°C to 25°C)

    • Keep in a cool, dry place away from excessive heat or moisture

    • Keep the tube tightly closed when not in use

    • Do not freeze

    • Keep out of reach of children

    • Keep medication in its original labeled packaging

    • Carry medication in your carry-on bag when flying

    • Avoid exposing the medication to extreme heat or cold, especially in cars or checked luggage

    • If symptoms develop while traveling, begin treatment as directed by your provider

    • Do not share this medication with others

When should this medication be used?

Your provider may recommend topical acyclovir if you experience symptoms of a herpes virus skin infection, including:

Cold sores (oral herpes):

  • Tingling, burning, or itching around the lips before a blister appears

  • Painful blisters or sores around the mouth or lips

Genital herpes:

  • Painful blisters or ulcers in the genital or anal area

  • Burning, itching, or irritation of the skin

Other localized herpes infections:

  • Small clusters of painful fluid-filled blisters

  • Crusting or ulcerated skin lesions caused by herpes viruses

This medication is most effective when started at the earliest sign of symptoms, such as tingling, itching, or redness before blisters appear. 

Your provider may include this medication in a travel medical kit so you can begin treatment quickly if symptoms develop while traveling.

  • Follow the directions on your prescription label.

    General instructions:

    • Apply the medication exactly as directed by your healthcare provider

    • Use enough ointment to completely cover all affected lesions

    • Treatment typically continues for 7 days

    • The medication is usually applied 6 times per day (approximately every 3 hours while awake) 

    Application instructions:

    • Wash your hands before and after applying the medication

    • Gently clean and dry the affected area before applying the ointment

    • Apply a thin layer over the entire affected area

    • Avoid rubbing the medication aggressively into the skin

    When applying the medication:

    • Use a finger cot, disposable glove, or applicator if possible

    • This helps prevent spreading the virus to other parts of your body or to other people 

    Important use instructions:

    • Begin treatment as early as possible after symptoms begin

    • Continue treatment for the full prescribed duration

    • Do not stop treatment early unless instructed by your provider

    Avoid:

    • Using the medication in the eyes

    • Applying the medication inside the mouth or nose unless directed by a provider

    • Sharing the medication with others

    This medication is intended for external skin use only.

    • Apply the missed dose as soon as you remember

    • If it is close to your next scheduled application, skip the missed dose

    • Do not apply extra medication to make up for a missed dose

    • Resume your normal application schedule as directed

    If you are unsure how to adjust your schedule after a missed dose, contact your pharmacy or provider

  • While taking topical acyclovir:

    • Use the medication exactly as prescribed and do not exceed the recommended frequency or duration 

    • Begin treatment as early as possible at the first sign of symptoms for best effectiveness 

    • Apply only to affected skin areas and avoid use on healthy skin unless directed

    • Do not use in the eyes, inside the mouth, or on mucous membranes 

    • Wash hands before and after application to prevent spreading the infection

    • Use a finger cot or glove when applying to avoid spreading the virus to other areas or to other people 

    • Avoid touching or picking at lesions, as this may worsen the infection or delay healing

    • This medication does not prevent transmission of herpes to others

    • Avoid close skin-to-skin contact during active outbreaks

    • Do not use this medication to prevent future outbreaks unless instructed by your provider 

    Risks while using topical acyclovir:

    Topical acyclovir is generally well tolerated, but may cause:

    • Local skin irritation, burning, or stinging

    • Itching or mild pain at the application site

    • Rare allergic skin reactions

    • Potential spread of infection if not applied properly

    Although systemic absorption is minimal, improper use or overuse may increase irritation without improving effectiveness

  • No clinically significant drug interactions have been identified with topical acyclovir. 

    However, always inform your healthcare provider if you take:

    • Prescription medications

    • Over-the-counter medications

    • Vitamins or supplements

    • Herbal products

Important Safety Information

  • Topical acyclovir is generally well tolerated, but important safety considerations apply.

    Most serious warnings may include:

    • Severe allergic reactions

    • Worsening skin irritation or swelling

    • Spread of infection to other areas of the body

    • Secondary skin infections

    This medication should not be used in the eyes. 

    Stop using the medication and seek medical care immediately if you experience:

    • Severe swelling of the face, lips, tongue, or throat

    • Difficulty breathing

    • Severe rash or blistering beyond the treated area

    • Intense burning or irritation after application

    • Signs of a spreading infection

    Although rare, antiviral resistance may occur, particularly in immunocompromised individuals.  

  • Do not use topical acyclovir if you:

    • have a known allergy to acyclovir or any component of the ointment 

    • have had a previous hypersensitivity reaction to antiviral medications similar to acyclovir

    • plan to apply the medication to the eyes, inside the mouth, or on mucous membranes, as this medication is intended for external skin use only 

    • Use with caution and speak with your healthcare provider before use if you:

    • have a weakened immune system (such as from HIV, cancer treatment, or immunosuppressive medications), as response to treatment may be reduced

    • have widespread or severe herpes infections requiring systemic (oral or IV) antiviral therapy

    • are pregnant or breastfeeding and have not discussed risks and benefits with your provider

    If you are unsure whether this medication is appropriate for your condition, contact your healthcare provider before use

  • Tell your healthcare provider if you:

    • Are allergic to acyclovir or similar antiviral medications

    • Have a weakened immune system

    • Have HIV or other immune disorders

    • Are pregnant or planning to become pregnant

    • Are breastfeeding

    This medication should not be used if you have known hypersensitivity to acyclovir or any component of the ointment. 

  • Common side effects may include:

    • burning or stinging at the application site

    • itching

    • mild pain, redness, or irritation

    Serious (seek medical care immediately):

    • signs of a severe allergic reaction (swelling, hives, trouble breathing)

    • severe or persistent diarrhea

    • worsening skin reaction such as severe redness, rash, or swelling

  • Stop taking the medication and seek immediate medical attention if you experience:

    • you develop signs of a severe allergic reaction, including swelling of the face, lips, tongue, or throat

    • you experience difficulty breathing or swallowing

    • severe skin irritation, rash, or worsening redness occurs at the application site

    • pain, swelling, or irritation becomes severe or does not improve

    • lesions worsen, spread, or do not begin to heal after completing treatment

    • you develop signs of a secondary skin infection, such as increased redness, warmth, drainage, or pus

    • you experience any unusual or severe reaction that concerns you

  • Overdose with topical acyclovir is unlikely due to minimal absorption through the skin.

    However, misuse or accidental ingestion may cause symptoms such as:

    • local skin irritation or excessive burning

    • redness or inflammation from overapplication

    • gastrointestinal discomfort if swallowed

    If a large amount is accidentally ingested or if unusual symptoms occur, contact your healthcare provider or poison control center immediately

  • Dispose of unused or expired acyclovir ointment properly to prevent accidental exposure or misuse:

    • Do not flush this medication down the toilet unless instructed to do so

    • Do not pour into drains

    • Use a medication take-back program if available in your area

    • If no take-back program is available, place the ointment in a sealed container and dispose of it in household trash

    • Keep all medications out of reach of children and pets

    Always follow local regulations or pharmacy guidance for proper medication disposal

Disclaimers

  • This prescription may have been issued through a telemedicine consultation with a licensed healthcare provider. If you experience severe symptoms, worsening illness, or any concerning reactions while using this medication, contact your prescribing clinician immediately or seek emergency medical care.

  • This medication guide summarizes important safety information derived from pharmacy labeling, medication manufacturers, and prescribing references. It is intended to help patients understand the safe use of medications included in the Superior Health & Wellness Travel Medical Kit.

    This guide does not contain the complete prescribing information for Topical Acyclovir Ointment. Always follow the directions provided by your healthcare provider and the instructions on the pharmacy label that accompanies your prescription.

    Medications included in travel medical kits are prescribed only after a clinical evaluation by a licensed healthcare provider. Prescriptions are issued based on your medical history, current medications, allergies, and overall health needs. Not all patients will qualify for every medication or kit configuration, and the contents of each kit may vary based on provider discretion and patient suitability.

    Some medications included in travel medical kits are commercially manufactured medications dispensed through licensed pharmacies. In certain cases, a medication may be provided as a compounded formulation prepared by a licensed compounding pharmacy when a provider determines that a compounded version is medically appropriate for a patient. Compounded medications are not reviewed or approved by the U.S. Food and Drug Administration (FDA) for safety or effectiveness but are prepared by licensed pharmacies in accordance with applicable pharmacy regulations.

    Travel Medical Kits are intended to provide limited medication support during travel when timely access to medical care may be difficult. These kits are not a substitute for routine medical care, primary care services, or emergency medical treatment. Purchasing a Travel Medical Kit does not establish a primary care relationship with Superior Health & Wellness and does not include ongoing medical supervision beyond the initial provider evaluation used to determine eligibility for the kit.

    Patients experiencing severe illness, worsening symptoms, medication reactions, or medical emergencies should seek immediate medical care or contact a licensed healthcare professional.

    Medical services and prescriptions offered through Superior Health & Wellness are provided by licensed healthcare professionals in accordance with applicable state and federal laws. Prescription medications are dispensed by licensed pharmacies following a valid provider prescription.

    Patients are encouraged to report negative side effects of prescription medications to the U.S. Food and Drug Administration (FDA). Visit MedWatch or call 1-800-FDA-1088.

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