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Hydrogen Peroxide Topical Solution, 40% (w/w) for the Treatment of Seborrheic Keratoses: A Review

Skin Therapy Letter 2020 January
HP40 (Eskata™) is a stabilized, topical solution of 40% hydrogen peroxide (H2O2) packaged in an applicator pen that is US FDA-approved to treat seborrheic keratoses (SKs). By harnessing the oxidative capabilities of H2O2 , 1-2 treatments with HP40 produced a higher rate of clearance of four SKs per patient compared to vehicle in two phase 3 trials. The clearance rate was higher for the face than the trunk and extremities. Similarly, the risks of pigmentary changes and scarring from HP40 were lower for the face than other locations. Further, based on an ex vivo study, HP40 may be less cytotoxic to melanocytes than cryotherapy, but clinical trials comparing these therapies are needed. Limitations of HP40 are its low efficacy and requirement of multiple treatments, which can result in elevated costs. The application can also be time-consuming, though extenders or even staff members can apply it. Therefore, HP40 may be better reserved for the treatment of facial SKs.

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