Cantharidin Treatment

Cantharidin is a solution that is used for the treatment of skin conditions such as molluscum and warts. Cantharidin is a blistering agent and can only be used by healthcare professionals.

After Cantharidin Application

• Wash off with soap and water after 4 hours.
• Treated area may turn red and swollen.
• Blistering is expected.
• The fluid in the blister may appear clear or blood-filled.

Blister Management

• Reduce blister size to minimise pain and discomfort:
  a) Carefully puncture the base of blister using a sterile needle.
  b) Gently compress on the blister with soft gauze to drain out the fluid.
  c) Do not peel off the blistered skin.
•  If the blister becomes very large and/or painful:
  a) Walk in to the Dermatology Clinic at KKH@Halifax, if visiting between 8.30am-3.00pm on weekdays.
  b) Proceed to Children’s Emergency, if outside of stated hours or on weekends/public holidays.
• If treated area is itchy, do not scratch. Take antihistamines if intolerable.

Follow up appointment

• Keep to your appointment(s) as scheduled.
• If you wish to change your appointment(s), please call the Central Appointments Hotline at 6294 4050.