Exhibit 99.3

Designated Filer:  Warburg Pincus Private Equity IX, L.P.

Issuer and Ticker Symbol:  Inspire Pharmaceuticals, Inc. [ISPH]

Date of Event Requiring Statement:  May 13, 2011

JOINT FILERS’ SIGNATURES

WARBURG PINCUS IX LLC

By:  Warburg Pincus Partners, LLC, its Sole Member
By:  Warburg Pincus & Co., its Managing Member
By:	/s/ Scott A. Arenare	Date:	May 16, 2011
	Name: Scott A. Arenare
	Title: Partner
WARBURG PINCUS PARTNERS, LLC
By:  Warburg Pincus & Co., its Managing Member
By:	/s/ Scott A. Arenare	Date:	May 16, 2011
	Name:   Scott A. Arenare
	Title:  Partner
WARBURG PINCUS & CO.
By:	/s/ Scott A. Arenare	Date:	May 16, 2011
	Name:   Scott A. Arenare
	Title:  Partner
WARBURG PINCUS LLC
By:	/s/ Scott A. Arenare	Date:	May 16, 2011
	Name:   Scott A. Arenare
	Title:  Managing Director
CHARLES R. KAYE
By:	/s/ Scott A. Arenare	Date:	May 16, 2011
	Name:   Charles R. Kaye
	By:  Scott A. Arenare, Attorney-in-Fact*
JOSEPH P. LANDY
By:	/s/ Scott A. Arenare	Date:	May 16, 2011
	Name:   Joseph P. Landy
	By:   Scott A. Arenare, Attorney-in-Fact**

___________________

* Power of Attorney given by Mr. Kaye was previously filed with the Securities and Exchange Commission on March 2, 2006 as an exhibit to the Schedule 13D filed by Building Products, LLC with respect to Builders FirstSource, Inc.

** Power of Attorney given by Mr. Landy was previously filed with the Securities and Exchange Commission on March 2, 2006 as an exhibit to the Schedule 13D filed by Building Products, LLC with respect to Builders FirstSource, Inc.