Exhibit 23.1

                    Consent of Independent Registered Public
                                Accounting Firm

We consent to the reference to our firm under the caption "Experts" and to the
use of our report dated February 2, 2005 (except Note 14, as to which date is
February 4, 2005), in Amendment No. 4 to the Registration Statement (Form S-1
No. 333-120757) and related Prospectus of AlgoRx Pharmaceuticals, Inc. dated
February 10, 2005.




                                                       /s/ Ernst & Young LLP




MetroPark, New Jersey
February 9, 2005