( GENEVA Switzerland April 27 2007...)Merck Serono Announces Presentation of Phase III Clinical Data on,Safinamide in Parkinson’s Disease at the American Academy of,Neurology 59th Annual Meeting,Health

GENEVA, Switzerland, April 27, 2007 – Merck Serono S.A. (virt-x: SEO) and its partner Newron Pharmaceuticals S.p.A. (SWX: NWRN) announced today that Professor Fabrizio Stocchi, MD, PhD, will present the results of the first Phase III trial of safinamide as an adjunctive treatment to dopamine agonists (DA) in early Parkinson’s disease (PD) patients at the American Academy of Neurology 59th Annual Meeting to be held in Boston from 28 April to 5 May 2007.

The abstract entitled "Safinamide, a New Anti-Parkinson Agent is Effective and Well-Tolerated in Early PD Patients on a Stable Dose of a Single DA-Agonist: Results of a Randomized, International, Placebo-Controlled, Phase III Trial" was accepted for an oral presentation that is scheduled for Tuesday, May 1, 2007 at 3.45pm at Session S20: Movement Disorders: Essential Tremor and Medications for Parkinson’s Disease, at the Hynes Convention Center in Boston, MA, U.S.A.

Fabrizio Stocchi is a Professor of Neurology and Honorary Consultant at the IRCCS San Raffaele Rome, University "La Sapienza". He is Director of the Movement Disorders Centre and the Clinical Trial Center of the same institute.

In October 2006, Merck Serono and Newron signed a global development and commercialization agreement under which Newron has granted Merck Serono exclusive worldwide rights to develop, manufacture and commercialise safinamide in

Merck Serono 9 Chemin des Mines Corporate Media Relations Corporate Investor Relations 1202 Geneva Tel:+41 22 414 36 00 Tel:+41 22 414 36 01 Switzerland Media Relations, USA Investor Relations, USA www.merckserono.net Tel :+1 781 681 23 40 Tel:+1 781 681 25 52 News Release

Parkinson’s disease, Alzheimer’s disease, other cognitive disorders and Restless Leg Syndrome.

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