EXHIBIT 23.1


            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration
Statements on Form S-8 (Nos.33-50480, 33-85330, 33-97176, 333-33891, 333-80663,
333-61132, 333-97375, and 333-119257) and on Form S-3 (Nos. 333-74464 and
333-121225) of Regeneron Pharmaceuticals, Inc., of our report dated February 27,
2006 relating to the financial statements, management's assessment of the
effectiveness of internal control over financial reporting and the effectiveness
of internal control over financial reporting, which appears in this Form 10-K.


PRICEWATERHOUSECOOPERS LLP

New York, New York
February 27, 2006