Polyphenon E for warts by Ray Sahelian, M.D.

The FDA approved a special extract of green tea as a prescription drug for the topical (external) treatment of genital warts caused by the human papilloma virus (HPV). The new drug, called Veregen (Polyphenon E) Ointment is the first prescription botanical (herbal) drug approved by FDA under the “new” drug amendments of 1962 that required drugs to be proven both safe and effective prior to being marketed in the U.S. The active drug ingredient, Polyphenon E, represents a proprietary mixture of phytochemicals produced from a partially purified water extract of green tea leaves. Green tea, brewed from the leaves of the tea plant (Camellia sinensis), is one of the most popular beverages worldwide. Unlike leaves used for black or oolong teas, leaves used to prepare “green” tea do not undergo a fermentation process. Therefore, green tea retains higher levels of highly antioxidant polyphenolic compounds known as catechins.

Polyphenon E research
Polyphenon E has been shown to have significant pharmacological activities when tested both internally and externally in animals and humans. For FDA drug approval, the safety and efficacy of Polyphenon E Ointment were studied in two prospective, randomized, double-blind clinical studies in nearly 400 adults with external genital and anal warts ranging in number from 2 to 30. Test subjects applied the ointment three times daily until complete clearance of all warts. In each of these clinical trials, the median time to clear warts completely was 16 weeks and 10 weeks, respectively. Changes in the skin over the site of use were the most commonly reported side effects and included redness, itching, burning, pain/discomfort, ulceration, swelling, and local hardening of the skin.


FDA defines a “botanical” as a product that exclusively contains ingredients from plants, algae or fungi. In contrast to most conventional pharmaceutical drugs comprised of one single chemical, botanicals contain complex mixtures of naturally-occurring chemicals. In order to more appropriately evaluate herbal mixtures, in June 2004 the FDA published Guidance for Industry for Botanical Drugs, a new policy providing advice for potential botanical drug manufacturers, describing both the application process and providing recommendations as to how chemically complex products might satisfy the requirements of FDA’s rigorous “new drug” review process.

About Polyphenon E Ointment
Polyphenon E Ointment, 15% is a botanical drug approved as a topical treatment of external genital and anal warts in adults. External genital warts, caused by human papilloma viruses (HPV type 6 or 11), are one of the most common and fastest-spreading venereal diseases worldwide. Scientists estimate that as many as 1 million new cases of genital warts are diagnosed in the United States each year. Approximately 14 million people in the United States and 15 million people in Europe are infected with HPV.

Polyphenon E Ointment is a product of global development. In 1997, Epitome Pharmaceuticals Ltd., a privately owned Canadian company (Halifax, Nova Scotia) licensed from Mitsui Norin, Ltd. (Tokyo, Japan), a patented method of treating external genital warts through the topical application of Polyphenon E green tea extract, the patent for which extends through 2017. Epitome sublicensed the technology to MediGene AG of Munich, Germany, which collaborated in two multi-center Phase II clinical trials. In 2003 MediGene extended its license to include the treatment of hyperplasia caused by papilloma viruses. In 2004 MediGene conducted two Phase III trials, one in Europe and another in the Americas. Based on these trial results, MediGene submitted a New Drug Application (NDA) to the FDA Center for Drug Evaluation and Research in September 2005. FDA accepted the NDA for filing in early December 2005. MediGene reportedly plans to submit European marketing authorization applications for the drug before the end of 2006. MediGene is the first German biotech company to obtain marketing authorization for a drug in the United States.

Polyphenon E Ointment was developed by MediGene, a German company, and will be marketed in the United States by Bradley Pharmaceuticals of Fairfield, NJ. MediGene predicts peak sales potential of up to $100 million annually. The drug will be commercialized in the United States by MediGene’s marketing partner, Bradley Pharmaceuticals, Inc.  operating units will market Polyphenon E Ointment, 15%, with the Doak Dermatologics subsidiary promoting the drug to dermatologists, and Bradley's Kenwood Therapeutics division marketing this topical therapy to obstetric and gynecological physicians.