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Cantharidin
Aka: Cantharidin
- Mechanism
- Vesicant obtained from Blister beetle
- Indications
- Stubborn periungual warts
- May be useful in Molluscum Contagiosum in children
- Obtaining
- No longer available is U.S., but available in Canada
- Manufactured by Omniderm
- Phone: 1-888-458-0158
- Fax: 1-514-458-1477
- Preparations
- Cantharidin (Cantharone, Canthacur)
- Canthacur PS (w/ Podophyllin 5% + Salicylic Acid 30%)
- Reserve for Plantar Warts due to irritation
- Precautions
- Apply ONLY in office
- Avoid touching normal skin
- Application
- Allow liquid to dry over wart
- Then cover with occlusive tape (e.g. Blenderm)
- Remove tape after 24 hours
- Remove earlier for significant discomfort
- In 2-3 days remove Blister under Local Anesthesia
- Snip off near base OR Curette
- Benefits of removing Blister
- Prevents progression to ring wart
- Prevents recurrence
- Follow-up
- Consider repeat treatment weekly as tolerated