POWER OF ATTORNEY


I,Clateo Castellini, a resident of Switzerland,
of legal age and legally competent for all purposes, do hereby grant this
Power of Attorney to John S. Russell, Executive Vice President, General
Counsel and Chief Administrative Officer of Quintiles Transnational Corp.
(the "Company"), James L. Bierman, Executive Vice President and Chief
Financial Officer and Tammy B. Stogner, Senior Director, Finance, who are
of legal age and who are legally competent for all purposes, and with full
power of substitution so that they, or any of them, may perform any and all
acts necessary to achieve the purposes, described herein below.  I
expressly authorize the said attorneys-in-fact, or any of them, to execute
and deliver to the Securities and Exchange Commission on my behalf and on
behalf of any trust of which I am a trustee the Initial Statement of
Beneficial Ownership of Securities on Form 3, the Statement of Changes in
Beneficial Ownership on Form 4, the Annual Statement of Changes in
Beneficial Ownership on Form 5 and any amendments to said Form 3, Form 4 or
Form 5 for securities of the Company that I or any trust of which I am a
trustee now or hereafter beneficially own based on the information which I
shall provide.  The authority under this Power of Attorney shall continue
until the undersigned is no longer required to file Forms 3, 4 and 5 with
regard to the ownership of or transactions in securities of the Company by
the undersigned or any trust which the undersigned is a trustee, unless
earlier revoked in writing.  The undersigned acknowledges that John S.
Russell, James L. Bierman and Tammy B. Stogner are not assuming any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.

IN TESTIMONY WHEREOF, I hereby sign this Power
of Attorney in the City of Lugano, on this the 22nd day of January, 2004.




						/s/Clateo Castellini
						Signature



						Clateo Castellini
						Print Name