October 5, 2005

Neurochem receives third positive recommendation from Independent Safety Review Board to continue Phase III clinical trial for Alzhemed™

Neurochem Inc. (NASDAQ: NRMX; TSX: NRM) announced today that its Independent Safety Review Board (ISRB) has issued a third recommendation to continue the Company's North American Phase III clinical trial for Alzhemed™, an investigational product candidate for the treatment of Alzheimer's disease (AD). The recommendation by the ISRB members was based on their recent review of the safety data from 1,042 patients who have been on study medication for an average of 20 weeks.

Neurochem's ISRB for Alzhemed™ is made up of independent medical experts who monitor and evaluate the safety of patients taking part in the Alzhemed™ Phase III clinical trial in North America.

About Alzhemed™

Alzhemed™ has entered into a multicenter, randomized, double-blind, placebo-controlled, three-armed, parallel-design Phase III clinical trial; 68 clinical centers have been enrolled in North America. A total of 1,052 patients have been randomized to receive study medication over a period of 18 months. The Company also launched its Phase III clinical trial in Europe in September 2005.

Alzhemed™ is an orally administered, small organic molecule that has been specifically designed to modify the course of AD through its anti-amyloid activity. As part of a "disease modifying" novel class of product candidates, Alzhemed™ is expected to act at two levels: by preventing and stopping the formation and the deposition of amyloid fibrils in the brain and by binding to soluble Aß protein to reduce the amyloid-induced toxicity on neuronal and brain inflammatory cells associated with amyloid build-up in AD.

About Neurochem

Neurochem is focused on the development and commercialization of innovative therapeutics for neurological disorders. The Company's pipeline of proprietary, disease-modifying oral products addresses critical unmet medical needs. 1,3-propanedisulfonate (1,3PDS; Fibrillex™) is designated as an orphan drug, a Fast Track product candidate and is also part of an FDA Continuous Marketing Applications Pilot 2 program. The Phase II/III clinical trial of Fibrillex™ for the treatment of AA Amyloidosis was concluded in April 2005. The Company is in the process of submitting a New Drug Application (NDA) for Fibrillex™ that the FDA has agreed to file and review. 3-amino-1-propanesulfonic acid (3APS; Alzhemed™), for the treatment of Alzheimer's disease, is in a North American as well as European Phase III clinical trial and 3APS (Cerebril™), for the prevention of Hemorrhagic Stroke caused by Cerebral Amyloid Angiopathy, has completed a Phase IIa clinical trial.

To Contact Neurochem

For additional information on Neurochem and its drug development programs, please call the North American toll-free number 1 877 680-4500 or visit our Web Site at: www.neurochem.com.

Certain statements contained in this news release, other than statements of fact that are independently verifiable at the date hereof, may constitute forward-looking statements. Such statements, based as they are on the current expectations of management, inherently involve numerous risks and uncertainties, known and unknown, many of which are beyond Neurochem's control. Such risks include but are not limited to: 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, as well as other risks disclosed in public filings of Neurochem. Consequently, actual future results may differ materially from the anticipated results expressed in the forward-looking statements. The reader should not place undue reliance, if any, on the forward-looking statements included in this news release. These statements speak only as of the date made and Neurochem is under no obligation and disavows any intention to update or revise such statements as a result of any event, circumstances or otherwise. Please see the Annual Information Form for further risk factors that might affect the Company and its business.

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

275 Armand-Frappier
Laval (Quebec)
H7V 4A7
Tel: (450) 680-4500
Fax: (450) 680-4501

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