Launch of world’s first prescription cannabis medicine

Porton Down, UK, 21 June 2010: GW Pharmaceuticals plc (GWP:AIM) today announces the UK launch of Sativex®, its Oromucosal Spray for the treatment of spasticity due to Multiple Sclerosis (MS). Sativex® is the world’s first prescription cannabis medicine and the UK is the first country in the world to grant a full regulatory authorization for the product.

Sativex® contains two cannabinoids or active ingredients – THC (delta-9-tetrahydrocannabinol) and CBD (cannabidiol). It is the first cannabinoid medicine derived from whole plant extracts from the cannabis sativa plant.

Sativex®, available as a prescription only medicine, was developed by GW in specific response to calls from people with MS for a prescription cannabis-based medicine. Today’s launch means that MS patients suffering the spasms and cramping associated with spasticity have access to a new treatment option which has been shown to improve their symptoms where current treatments have failed.

Sativex® is manufactured by GW under Home Office licence at an undisclosed location in the UK. The medicine is being marketed in the UK by GW’s UK licensee, Bayer Schering Pharma.