Prepared by R.R. Donnelley Financial -- Consent of Ernst & Young LLP

We consent to the incorporation by reference in the Registration Statements (Form S-8) pertaining to the Amended and Restated 1993 Stock Plan (Nos. 33-75390, 33-87420, 333-44097, 333-92425, 333-52370 and 333-75410) and the Employee Stock Purchase Plan (Nos. 33-75392 and 333-18519) of Neurobiological Technologies, Inc. of our report dated August 9, 2002, with respect to the financial statements of Neurobiological Technologies, Inc. included in the Annual Report (Form 10-K) for the year ended June 30, 2002.