The mechanism of action of cantharidin in the treatment of molluscum contagiosum is unknown.

YCANTH is indicated for the topical treatment of molluscum contagiosum in adult and pediatric patients 2 years of age and older.

• All healthcare professionals should receive instruction and training prior to preparation and administration of YCANTH. 
• For topical use only. Not for oral, mucosal, or ophthalmic use.
• Apply a single application directly to each lesion every 3 weeks as needed. 
• Do not use more than two applicators during a single treatment session.
• Remove with soap and water 24 hours after treatment. 
• For additional instructions on preparation and administration of YCANTH, see Full Prescribing Information.

Most common (incidence ≥1%) adverse reactions are the following local skin reactions at the application site: vesiculation, pain, pruritus, scabbing, erythema, discoloration, application site dryness, edema, and erosion.

None

• Toxicities Associated with Inappropriate Administration: Life threatening or fatal toxicities can occur if administered orally. Avoid contact with the treatment area, including oral contact, after treatment. Ocular toxicity can occur if YCANTH comes in contact with eyes. If YCANTH gets in eyes, flush eyes with water for at least 15 minutes.
• Local Skin Reactions: Reactions at the application site have included vesiculation, pruritus, pain, discoloration, and erythema. Avoid application near eyes and mucosal tissue, and to healthy skin. If YCANTH contacts any unintended surface, or healthy skin, immediately remove. If severe local skin reactions occur, remove prior to 24 hours after treatment.
• Flammability: YCANTH is flammable, even after drying. Avoid fire, flame or smoking near lesion(s) during treatment and after application until removed.