April 4, 2002

Neurochem presents Phase I Clinical Trial results and proof-of-concept data for drug candidate Alzhemed™ for Alzheimer's Disease.
Reported at the 7th International Geneva/Springfield Symposium on Advances in Alzheimer's Therapy.

Neurochem Inc. (TSX : NRM) presented promising results of three Phase I clinical studies with Alzhemed™, Neurochem's lead drug candidate for the treatment of Alzheimer's Disease. The data confirmed that the drug candidate is orally bioavailable, with a good safety and pharmacokinetic profile in healthy young adults and elderly subjects. At the 7th International Geneva/Springfield Symposium on Advances in Alzheimer's Therapy held in Geneva April 3-6, 2002, the Company also announced its plan to submit an application to regulatory authorities during Q2 2002 to advance Alzhemed™ to a Phase II clinical trial.

The safety, tolerability and pharmacokinetic profiles of Alzhemed™ have been investigated in two single dose and one multiple dose clinical Phase I trials. A total of 86 healthy subjects have been exposed to Alzhemed™ in these trials. In all these studies, Alzhemed™ has been shown to be safe and well tolerated at the anticipated therapeutic dose in both the young and the elderly volunteers. There were no serious adverse events reported.

"These Phase I results support Neurochem's approach to developing therapeutics for the treatment of central nervous system disorders by leveraging our expertise in amyloid biology," said Dr. Louis R. Lamontagne, President and CEO of Neurochem. "With such favorable results Neurochem expects to advance to Phase II clinical trials for Alzhemed™, a promising drug candidate with a disease-modifying profile for Alzheimer's Disease."

Submission to Regulatory Authorities for Phase II Study Scheduled for Q2 2002

Neurochem is actively preparing for a Phase II clinical trial to assess the safety and efficacy of Alzhemed™ in patients suffering from mild-to-moderate Alzheimer's Disease. The Phase II protocol, as designed by the Company and in consultation with its Clinical Advisory Board, includes a multicenter, randomized, double-blind, parallel and placebo study with approximately 450 patients to be enrolled in 35 centers in the U.S and Canada. The submission to the regulatory authorities is expected during Q2 2002.

Newly Released Preclinical Data for Alzhemed™ from Proof-of-Concept Studies in Transgenic Animal Model

The Company presented newly released data showing that Alzhemed™ significantly reduced the amount of toxic amyloid in the brain of transgenic mice treated at the onset of plaque formation. The preclinical study indicates that Alzhemed™ was found to significantly reduce the amount of total Aß concentration in the brain when administered at an early stage of the disease. The drug candidate was also found to significantly decrease brain and plasma soluble Aß, as well as reduce the accumulation of the characteristic toxic amyloid fibril deposits in the brain. These results suggest that Alzhemed™ may have important implications as a new class of disease-modifying drugs for the treatment of Alzheimer's Disease.

About Alzhemed™

Alzhemed™ is a small sulfonated molecule that has been specifically designed to interfere with the association of glycosaminoglycans with the Aß amyloidogenic protein, leading to the expected inhibition of the formation and the deposition of amyloid fibrils in the brain of Alzheimer's Disease patients. Alzhemed™'s anti-amyloid effectiveness has been demonstrated in an aggressive transgenic mouse model of brain amyloid with a significant 61% reduction in Aß plasma levels and a 30% reduction in Aß brain soluble and insoluble fractions after only 8 weeks of treatment.

The presentations can be viewed at:
www.neurochem.com/NewsRoom.htm .

Some facts about Alzheimer's Disease .

About Neurochem

Neurochem is an industry leader in the development of therapeutic drugs and diagnostic tools for central nervous system and amyloid-related diseases associated with aging. The Company has built a strong product pipeline by developing a novel, proprietary series of compounds that inhibit the formation, deposition and toxic effects of amyloid fibrils within the body. Neurochem's therapeutic programs target Alzheimer's Disease, Hemorrhagic Stroke (due to Cerebral Amyloid Angiopathy), Secondary Amyloidosis, Diabetes Type II and Epilepsy. Neurochem is using a multi-pronged approach towards the development of pharmaceuticals for Alzheimer's Disease, including glycosaminoglycans (GAGs) mimetics, a vaccine, an anti-inflammatory and neuroprotective approaches as well as the development, in collaboration with Amersham Health, of a diagnostic imaging tool. The Company has advanced to date three drug candidates to clinical trials: Alzhemed™, for the treatment of Alzheimer's Disease, Fibrillex™, for the orphan disease Secondary Amyloidosis, and Cerebril™, for Hemorrhagic Stroke. At present, the Company employs over 76 people and is located in Saint-Laurent, Canada (www.neurochem.com).

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

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

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