January 30, 2003

Neurochem lead investigator awarded NIH grant to support U.S. phase II clinical trials of Cerebril™.
Trials to evaluate use of Cerebril for prevention of recurrent Hemorrhagic Stroke due to Cerebral Amyloid Angiopathy.

- Neurochem, Inc. (TSX: NRM) - Steven M. Greenberg, M.D., Ph.D., Associate Professor of Neurology at Harvard Medical School and Co-Director of the Neurology Clinical Trials Unit at the Massachusetts General Hospital (MGH) has been awarded a grant of approximately $U.S.1 million from the National Institutes of Health (NIH) in support of Neurochem Inc.'s (TSX: NRM) U.S. Phase II clinical trials of Cerebril™. Investigation of Cerebril™ has been initiated in five U.S. clinical trial centers, including the MGH, for the prevention of recurrent Hemorrhagic Stroke due to Cerebral Amyloid Angiopathy (CAA).

Dr. Greenberg commented, "This will be the first study of a candidate drug for the treatment of CAA, a major cause of bleeding strokes in the elderly. The partnership between the National Institute of Neurological Disorders and Stroke, Neurochem and the participating stroke research centers underlines the importance of this rapidly growing area of investigation."

"This grant provides important support of Neurochem's approach to develop therapies to treat Hemorrhagic Stroke based on our understanding of the effects of amyloid formation in the brain," commented Denis Garceau, Ph.D., Neurochem's Vice President of Drug Development. "Over the past several years, the role of CAA as an underlying cause of disease, including Hemorrhagic Stroke, has become more widely recognized. This study continues to position Neurochem's leadership role in this field."

The U.S. Phase II clinical trial evaluates the safety, tolerability, pharmacokinetic, and pharmacodynamic profile of Cerebril in CAA patients who have experienced lobar cerebral hemorrhage. The data obtained from this study will determine the optimal dosage for Phase II/Phase III trials and thus offer a potentially important step towards a preventive therapy for this currently untreatable condition. The trial is a multicenter, randomized, double-blind and parallel design study. 24 CAA patients with lobar cerebral hemorrhage are randomized to receive 3 different dose levels of Cerebril for a period of twelve weeks.

About Hemorrhagic Stroke due to Cerebral Amyloid Angiopathy (CAA)

Hemorrhagic Stroke due to CAA, is characterized by the progressive invasion of the blood vessel walls in the brain by amyloid fibrils. The blood vessels become brittle and lead to recurrent strokes and potentially devastating lobar hemorrhages in the brain. The invasion of the blood vessel wall structure by Amyloid ß (Aß) can result in its rupture, leading ultimately to Hemorrhagic Stroke. It is considered a major type of stroke for which there is no effective treatment. While up to 80 percent of lobar hemorrhages are not fatal the first time, they are frequently recurrent and carry very high morbidity and mortality rates.

About Cerebril™

Cerebril is a small organic molecule that has been designed to modify the course of Hemorrhagic Stroke due to CAA by interfering with the association between glycosaminoglycans (GAGs) and Aß amyloid protein in the blood vessels of the brain of patients with CAA. As part of a "disease modifying" class of drug candidates, Cerebril™ is expected to act at two levels: first to prevent and stop the formation and deposit of amyloid fibrils and in binding to Aß, to then inhibit the inflammatory response associated with amyloid build-up in Hemorrhagic Stroke due to CAA.

About Neurochem

Neurochem is a product-driven, specialty pharmaceutical company which offers a new class of drug candidates to prevent and stop the progression of diseases for which no cure exists. The Company's strong and growing pipeline will meet unmet medical needs and is focused on disorders of the central nervous system and amyloid-related diseases. Neurochem's most advanced product candidate is Fibrillex™, in pivotal Phase II/III clinical development for the treatment of Secondary Amyloidosis, a fatal kidney disease. Two other product candidates in Phase II clinical development are Alzhemed™ for the treatment of Alzheimer's disease and Cerebril™ for Hemorrhagic Stroke due to Cerebral Amyloid Angiopathy. At the pre-clinical development stage, the Company has two potential products targeting Diabetes Type 2 and Epileptic Seizures induced by traumatic brain injury (www.neurochem.com).

About the National Institute of Neurological Disorders and Stroke (NINDS)

The NINDS is a component of the National Institutes of Health with the U.S. Department of Health and Human Services.

All of the statements contained in this news release, other than statements of fact which are independently verifiable at the date hereof, are forward-looking statements. Such statements, based as they are on the current expectations of management, inherently involve numerous risks and uncertainties, known and unknown. Some examples of known risks are: the impact of general economic conditions, general conditions in the pharmaceutical industry, changes in the regulatory environment in the jurisdictions in which Neurochem does business, stock market volatility, fluctuations in costs, and changes to the competitive environment due to consolidation or otherwise. Consequently, actual future results may differ materially from the anticipated results expressed in the forward-looking statements.

For further Information, please contact:
Dr. Lise Hébert
Vice-president, Corporate Communications
lhebert@neurochem.com

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