Cantharidin Topical Side Effects

Medically reviewed by Drugs.com. Last updated on Jun 21, 2024.

Applies to cantharidin topical: topical application solution.

Serious side effects of cantharidin topical

Along with its needed effects, cantharidin topical may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking cantharidin topical:

More common side effects

• changes in color of the skin
• flushing, redness of the skin
• skin ulcers
• swelling of the skin
• unusually warm skin

Incidence not known

• blurred vision or blue-green halos seen around objects
• dry eyes
• sensitivity of the eyes to light

For healthcare professionals

Applies to cantharidin topical: topical liquid.

General adverse events

Adverse reactions were primarily local skin reactions at the application site which was reported in 97% of patients and discontinuation due to adverse reactions was reported in 2.3% of patients.^[Ref]

Dermatologic

• Common (1% to 10%): Moderate contact dermatitis^[Ref]

Local

• Very common (10% or more): Mild application site dryness (19%), mild application site discoloration (28%), mild application site erythema (24%), mild application site scab (39%), mild application site pruritus (47%), mild application site pain (41%), mild application site vesicles (60%)
• Common (1% to 10%): Mild application site erosion, mild application site edema^[Ref]

Further information

Cantharidin topical side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer