Answer
Jul 28, 2026 - 01:56 PM
The correct time depends on the specific cantharidin product and your clinician’s instructions:
- YCANTH 0.7%: wash the treated area gently with soap and water 24 hours after application. Wash it off sooner if you develop severe pain, severe blistering, or another strong skin reaction.
- Compounded cantharidin used for warts: instructions vary considerably—often 2–8 hours, depending on the concentration, treatment area, and whether it was covered.
Do not leave it on longer because it can cause excessive blistering or a chemical-burn-like injury. If you were not given a wash-off time, contact the treating clinic or pharmacy; do not assume 24 hours.
