US Patent Granted for Sativex in Cancer Pain

Thursday, June 9, 2011
GW Pharm
US PATENT GRANTED FOR SATIVEX® IN CANCER PAIN

Porton Down, UK; 20 April 2011: GW Pharmaceuticals plc (AIM: GWP) today announces that the United States Patent and Trademark Office has issued a Notice of Allowance for a patent which protects the use of Sativex® as a treatment for cancer pain.

The patent, entitled "Pharmaceutical Compositions for the Treatment of Pain", provides an exclusivity period until April 2025. The patent specifically covers a method of treating cancer related pain by administering a combination of the cannabinoids cannabidiol (CBD) and delta-9 tetrahydrocannabinol (THC), the two principal cannabinoids in Sativex®. In addition to this newly granted patent, Sativex® is protected by a number of other patents related to different aspects of the product.

Sativex® is currently in Phase III clinical development as a treatment for cancer pain. Cancer pain represents the lead indication for Sativex® in the United States, where the medicine is partnered with Otsuka Pharmaceutical Co. Ltd.

Dr Geoffrey Guy, GW's Chairman, said, "The grant of this US patent covering Sativex® as a treatment for cancer pain is part of a broad platform of intellectual property rights which continue to be developed by GW. GW now has 35 patent families as well as other forms of protection such as plant variety rights and proprietary know-how. We believe that this matrix of intellectual property provides GW with a unique position to benefit from the rich promise within the field of cannabinoid therapeutics."

Sativex® is approved in the UK, Spain, Czech Republic, Canada and New Zealand as a treatment of Multiple Sclerosis spasticity.