( possibility. These properties of CNS 51...)Independent publication supports the profile of CeNeS phase II,compound, CNS 5161,Health

possibility. These properties of CNS 5161, together with its low liability to induce side-effects, are the scientific foundation for our clinical development programme of CNS 5161 as a novel treatment for the major neuropathic pain market. We plan to test CNS 5161 in further Phase II trials in cancer pain and neuropathic pain later this year."

*In vitro and in vivo characterization of [3H]CNS-5161. A use-dependent ligand for the N-methyl-d-aspartate receptor in rat brain. Biegon et al., Synapse, volume 61, pages 577-586, 2007.

For more information please contact: CeNeS Pharmaceuticals plc Neil Clark, CEO Tel: +44 (0)1223 266 466

JM Finn Geoff Nash Tel: +44(0) 207 628 9688

Financial Dynamics Ben Brewerton/Emma Thompson Tel: + 44 (0) 207 831 3113

About CeNeS Pharmaceuticals CeNeS is a biopharmaceutical company specialising in the development and commercialisation of drugs for pain control, sedation and other CNS disorders such as Parkinson's disease. The company is based in Cambridge, England. For further information visit the CeNeS web site: www.cenes.com

About CNS 5161 A range of primary diseases or conditions such as diabetes, cancer, HIV/Aids and shingles, or surgical procedures such as limb amputation can result in nerve damage which leads to a sustained chronic pain. This neuropathic pain is difficult to treat as traditional analgesics do not provide adequate relief for many patients. Drug treatments for neuropathic pain represent a significant area of unmet medical need and a growing market opportunity that is currently valued at over $2 billion globally. Glutamate (particularly NMDA) receptors have been implicated in the induction and maintenance of neuropathic pain and NMDA antagonists may represent a class of drugs for effective relief of neuropathic pain. CNS 5161 is a blocker of the NMDA ion channel and has completed Phase I and more recently Phase IIa proof of c
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