EXHIBIT 23.1

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


         We consent to the incorporation by reference in the Registration
Statement (Form S-8) pertaining to the Biosite Incorporated Employee Stock
Purchase Plan of our report dated January 19, 2001 with respect to the
consolidated financial statements of Biosite Incorporated (formerly Biosite
Diagnostics Incorporated) included in its Annual Report (Form 10-K) for the year
ended December 31, 2000, filed with the Securities and Exchange Commission.



                                                     /s/ ERNST & YOUNG LLP

                                                     ERNST & YOUNG LLP

San Diego, California
June 20, 2001