Cantharone Topical Liquid (Cantharidin) Shopper Approved

Prescription Prescription Required FormationFormulation: Liquid

Cantharone Topical Liquid

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Prescription Prescription Required FormationFormulation: Liquid


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Cantharone Topical Liquid (generically known as Cantharidin) is a blistering agent that is commonly used for the removal of common warts, molluscum contagiosum, and periungal warts. When applied topically, cantharidin causes a controlled blistering of the skin, which lifts the wart or growth.

Cantharidin works by stimulating the release of cytokines, which are proteins that regulate the immune response. It leads to an inflammatory response, which causes an influx of white blood cells to the affected area.

Use and Dosage

Cantharone Topical Liquid is a medicinal preparation containing 0.7% cantharidin and is applied in affected areas.  The solution may be applied with a cotton swab or dropper.

Here are the general steps for using Cantharone Topical Liquid:

  1. Clean the affected area thoroughly with soap and water and dry it.
  2. Using an applicator brush, apply a small amount of the liquid to the wart or affected area.
  3. Allow the liquid to dry completely. It usually takes about 5-10 minutes.
  4. Cover the area with a small piece of adhesive bandage or tape if desired.
  5. Leave the bandage on for 24 hours.
  6. After 24 hours, remove the bandage and soak the affected area in warm water for about 10-15 minutes.
  7. Gently scrape the treated area with a disposable emery board or pumice stone to remove dead skin.
  8. Apply petroleum jelly or antibiotic cream to the treated area and cover it with a bandage.
  9. Repeat the process every week until the wart or affected area is completely removed.

Follow the instructions given by your healthcare provider regarding the frequency and duration of the treatment. If you experience any adverse reactions, such as severe skin irritation, rash, or infection, seek medical attention immediately.

Side Effects

Common Side Effects of Cantharone Topical Liquid (Cantharidin):

  • Blistering
  • Burning sensation
  • Local erythema (redness of the skin)
  • Pain

Serious Side Effects of Cantharone Topical Liquid (Cantharidin):

  • Signs of an allergic reaction such as: rash, hives, itching, swelling, and difficulty breathing may occur in some cases

Forms and Strength

Cantharone Topical Liquid (Cantharidin) is available in the following forms and strength:

Cantharone Topical Liquid: Liquid

  • 0.70%


  • Cantharidin can be poisonous if ingested.
  • The FDA (Food and Drug Administration) cautions against using cantharidin without proper medical supervision.
  • Cantharidin should be used with caution around sensitive areas such as the eyes or mouth.
  • Care should be taken when applying Cantharone to avoid it coming into contact with unaffected skin.
  • Cantharidin should not be used for warts that are large or located on the face, mucous membranes, or in the genital area.
  • Cantharidin should not be used on irritated or broken skin.
  • Cantharidin should not be used during pregnancy or while breastfeeding unless recommended by a healthcare provider.
  • Always follow the instructions of a healthcare provider when using Cantharone or any other medications.
  • Cantharidin should not be used on children under the age of 12 without medical supervision.
  • Cantharidin may cause skin irritation or pain, which should be reported to a healthcare provider.
  • Cantharidin should not be used on suspicious or changing skin lesions.
  • Cantharidin can cause blistering, which can be painful and may lead to infection if not properly cared for.
  • Care should be taken to avoid inhalation or ingestion of Cantharidin, as it can be toxic if absorbed into the body through these routes.
  • Cantharidin should not be used on moles or birthmarks or areas of skin that have been previously treated with radiation therapy.
  • Cantharidin should not be used on skin that has been exposed to sunlight or UV light in the past 24 hours.
  • Patients with a history of allergic reactions to Cantharidin should not use Cantharidin.
  • Cantharidin should not be used in combination with other topical medications or procedures without medical supervision.
  • Patients should report any signs of infection, such as fever, redness or swelling, to their healthcare provider immediately.

Frequently Asked Questions (FAQ)

Can Cantharone be used to treat plantar warts?

Yes, Cantharone can be used to treat plantar warts.

Is Cantharone painful to apply?

Cantharone may cause pain or discomfort during application, but it typically subsides within a few minutes.

How often should Cantharone be applied?

The frequency of Cantharone application can vary depending on the patient and the severity of the warts. Your healthcare provider will provide specific instructions for treatment.

Can I treat warts at home with Cantharone?

Cantharone is a prescription medication that should only be applied by a healthcare professional. Do not attempt to treat warts at home with Cantharone or any other medication without proper medical supervision.


Additional information

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Quantities Available:

7.5mL, 22.5mL


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Online Pharmacies Canada has provided information from third parties intended to increase awareness and does not contain all the information about Cantharone Topical Liquid (Cantharidin). Talk to your doctor or other qualified medical practitioners for medical attention or advice, or if you have any concerns about Cantharone Topical Liquid (Cantharidin).