EXHIBIT 23.5

                       CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the incorporation by reference in this Registration
Statement on Form S-8 of our report dated February 22, 2000, relating to the
financial statements of RenaGel LLC, which appears in GelTex Pharmaceuticals,
Inc.'s Annual Report on Form 10-K for the year ended December 31, 1999.

                                    /s/ PricewaterhouseCoopers LLP

Boston, Massachusetts
September 26, 2001