EXHIBIT 5 [LOGO OF KPMG] KPMG LLP Chartered Accountants 2000 McGill College Avenue Telephone (514) 840-2100 Suite 1900 Telefax (514) 840-2187 Montreal Quebec H3A 3H8 www.kpmg.ca ACCOUNTANTS' CONSENT The Board of Directors of Neurochem Inc. We refer to the Form F-10 Registration Statement (Registration No. 333-108094) and related prospectus of Neurochem Inc. We consent to the use of our report dated August 8, 2003 (except note 18(b), which is as of August 12, 2003) with respect to the consolidated balance sheets of Neurochem Inc. as at June 30, 2003 and 2002, and the consolidated statements of operations, shareholders' equity and cash flows for each of the years in the three-year period ended June 30, 2003, and for the period since inception (June 17, 1993) to June 30, 2003 incorporated by reference herein, and to the reference to our firm under the heading "Independent chartered accountants" in the prospectus. /s/ KPMG LLP Chartered Accountants Montreal, Canada August 27, 2003