Polyphenon E: a new treatment for external anogenital warts

Area of Science:

• Dermatology
• Virology
• Pharmacology

Background:

• External genital warts (EGWs) are a common, contagious condition caused by human papillomavirus (HPV).
• Green tea catechins possess known immunostimulatory, antiproliferative, and antitumour properties.
• Polyphenon E is an ointment containing a mixture of green tea catechins (sinecatechins).

Purpose of the Study:

• To evaluate the efficacy and safety of Polyphenon E ointment in treating EGWs.
• To gather additional data from two randomized, double-blind, vehicle-controlled trials.

Main Methods:

• 1005 adult patients with EGWs were randomized to receive vehicle, 10% Polyphenon E ointment, or 15% Polyphenon E ointment three times daily for up to 16 weeks.
• Treatment continued until complete clearance of EGWs or for a maximum of 16 weeks.
• Efficacy and safety were assessed throughout the treatment and follow-up period.

Main Results:

• Complete clearance of EGWs was achieved in 53.6% (10% group) and 54.9% (15% group) of patients treated with Polyphenon E, compared to 35.4% in the vehicle group (P < 0.001).
• Statistically significant differences in clearance rates were observed after 6 weeks of treatment.
• Active treatment approximately doubled the odds of complete clearance and reduced the time to clearance.
• Recurrence rates were low and similar across all groups.
• Adverse events were comparable, though moderate local reactions were more frequent in active treatment groups.

Conclusions:

• Polyphenon E ointment is an effective treatment for external genital warts.
• The ointment demonstrates a favorable safety profile and is well-tolerated by patients.