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Cantharidin

Phase 3

Common Warts (Verruca Vulgaris) | Small molecule | Infectious Disease |Verrica Pharmaceuticals Inc.|Last Updated: May 5, 2026

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment600

FDA Designations

No designations recorded

Clinical trial landscape

Cantharidin · 1 trial · 4 indications

Phase 3 1
NCT07457918Long-Term Follow-up Study of Cantharidin (YCANTH [VP-102/TO-208]) in Patients With Common Warts (Verruca Vulgaris)Common Warts (Verruca Vulgaris)
RECRUITING600 Analytics
PHASE3RECRUITING
Long-Term Follow-up Study of Cantharidin (YCANTH [VP-102/TO-208]) in Patients With Common Warts (Verruca Vulgaris)
Common Warts (Verruca Vulgaris)Unlock trial analytics

Study Endpoints

Primary Endpoints

Incidence and severity of AEs including LSRs.
Day of transition to this LTFU study to End of Study Visit Day 378.

To assess the safety of YCANTH (VP-102/TO-208) by assessing adverse events (AEs), including expected local skin reactions (LSRs).

Change from baseline in vital signs (body temperature)
Day of transition to this LTFU study to End of Study Visit Day 378.

To assess the safety of YCANTH (VP-102/TO-208) by assessing the change from baseline body temperature.

Change from baseline in vital signs (pulse)
Day of transition to this LTFU study to End of Study Visit Day 378.

To assess the safety of YCANTH (VP-102/TO-208) by assessing the change in baseline in vital signs (pulse).

Concomitant medication use
Day of transition to this LTFU study to End of Study Visit Day 378.

To assess the safety of YCANTH (VP-102/TO-208) by assessing concomitant medication use.

Proportion of subjects achieving clearance (reduction to zero) at the Day 378 EOS Visit of all treatable warts present at Baseline*
Baseline* to End of Study Visit Day 378.

To evaluate the efficacy of continued dermal application of YCANTH (VP-102/TO-208) when applied to each common wart once every 21 days for a maximum of 4 additional treatments. \*Baseline in the study will be either 1) Treatment Visit 1 (Day 1) of the parent study for subjects who received YCANTH (VP-102/TO-208) during the parent study; 2) the first Treatment Visit of this study for subjects who received Vehicle in the parent study; or 3) Treatment Visit 1 of the parent study for subjects who received Vehicle in the parent study and did not receive YCANTH (VP-102/TO-208) during this study.

Secondary Endpoints

Proportion of subjects achieving clearance of all treatable warts at each Treatment Visit after transition to this LTFU study.
Each Treatment Visit in this study (up to 4) and by the End of Study visit Day 378
Mean percent change from baseline in the number of treatable warts present at the Day 378 EOS Visit.
Baseline to End of Study Visit Day 378.
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
VP-102/TO-208EXPERIMENTALCombination Product: Cantharidin

Interventions

NameTypeDescription
CantharidinCOMBINATION_PRODUCTA single-use applicator and applied in sufficient quantity to cover the entirety of each treatable common wart, including approximately a 1 to 2 mm margin of surrounding, healthy skin. The contents of no more than 2 applicators may be applied at each treatment visit. Each applicator contains 0.45 mL of 0.7% w/v cantharidin. Occlusive tape (occlusive tape with similar properties should be used across all clinical sites) will be applied to warts that have been treated. Once applied, the occlusive tape should be gently rubbed to maximize adherence to the treated area.
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Eligibility Criteria

Age Range2 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: Candidates will be included in the study if they: 1. Meet ≥ 1 of the following criteria: 1. Completed the Day 84 visit in the parent study and have ≥ 1 treatable common warts. 2. Completed the Day 105 visit in the parent study and have ≥ 1 treatable common warts. 3. C...

Countries:United States
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Frequently asked questions about Cantharidin

What is Cantharidin used for?

Cantharidin is an investigational small molecule being developed for the treatment of common warts (Verruca Vulgaris). It is currently in Phase 3 clinical development and is not yet approved by the FDA.

Who makes Cantharidin?

Cantharidin is being developed by Verrica Pharmaceuticals Inc. (NASDAQ: VRCA). The company is conducting a Phase 3 clinical trial to evaluate the drug in patients with common warts.

What phase is Cantharidin in?

Cantharidin is in Phase 3 clinical development. It is an investigational drug and has not been approved by the FDA. The ongoing Phase 3 trial is a long-term follow-up study in patients with common warts.

What clinical trials is Cantharidin in?

Cantharidin is being studied in a Phase 3 clinical trial with the identifier NCT07457918. This is a long-term follow-up study in patients with common warts (Verruca Vulgaris), with an estimated enrollment of 600 participants in the United States.

Is Cantharidin the same as YCANTH or VP-102?

Yes, Cantharidin is also known as YCANTH and VP-102. The Phase 3 clinical trial for common warts is titled 'Long-Term Follow-up Study of Cantharidin (YCANTH [VP-102/TO-208]) in Patients With Common Warts (Verruca Vulgaris).'