<PAGE>
EXHIBIT 24
POWER OF ATTORNEY
Each of the undersigned officers and directors of Cardinal Health, Inc., an
Ohio corporation (the "Company"), whose signatures appear below constitute and
appoint Robert D. Walter, Steven Alan Bennett, Brendan A. Ford and Paul S.
Williams, and each of them, his/her true and lawful attorneys-in-fact and
agents, with full power of substitution and revocation, in his/her name and on
his/her behalf, to do any and all acts and things and to execute any and all
instruments which they and each of them may deem necessary or advisable to
enable the Company to comply with the Securities Act of 1933, as amended (the
"Act"), and any rules, regulations or requirements of the Securities and
Exchange Commission in respect thereof, in connection with the registration
under the Act of shares of capital stock of the Company to be issued or made
available for issuance, pursuant to the Agreement and Plan of Merger, dated as
of December 2, 2000, among the Company, Brick Merger Corp., a wholly owned
subsidiary of the Company and Bindley Western Industries, Inc. and the
transaction contemplated thereby, including power and authority to sign his/her
name in any and all capacities (including his/her capacity as a director and/or
officer of the Company) to one or more Registration Statements on Form S-4
(including without limitation, pursuant to Rule 462(b) under the Act), on Form
S-8 and on Form S-3 or such other form as may be appropriate, and to any and
all amendments, including post-effective amendments, to any such Registration
Statements, and to any and all applications, instruments or documents filed as
part of or in connection with such Registration Statements or any amendments
thereto, and hereby ratify and approve all acts of any such attorney or
substitute.
This Power of Attorney has been signed in the respective capacities on the
respective dates indicated below.
<TABLE>
<CAPTION>
SIGNATURE TITLE
--------- -----
<S> <C>
/s/ Robert D. Walter Chairman, Chief Executive Officer and Director
______________________________________ (Principal Executive Officer)
ROBERT D. WALTER
January 8, 2001
/s/ Richard J. Miller Executive Vice President and Chief Financial
______________________________________ Officer (Principal Financial Officer and
RICHARD J. MILLER Principal Accounting Officer)
January 8, 2001
/s/ Dave Bing Director
______________________________________
DAVE BING
January 8, 2001
/s/ George H. Conrades Director
______________________________________
GEORGE H. CONRADES
January 8, 2001
/s/ John F. Finn Director
______________________________________
JOHN F. FINN
January 8, 2001
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
SIGNATURE TITLE
--------- -----
<S> <C>
/s/ Robert L. Gerbig Director
______________________________________
ROBERT L. GERBIG
January 8, 2001
/s/ John F. Havens Director
______________________________________
JOHN F. HAVENS
January 8, 2001
/s/ Regina E. Herzlinger Director
______________________________________
REGINA E. HERZLINGER
January 8, 2001
/s/ John C. Kane Director
______________________________________
JOHN C. KANE
January 8, 2001
/s/ J. Michael Losh Director
______________________________________
J. MICHAEL LOSH
January 8, 2001
/s/ John B. McCoy Director
______________________________________
JOHN B. MCCOY
January 8, 2001
/s/ Richard C. Notebaert Director
______________________________________
RICHARD C. NOTEBAERT
January 8, 2001
/s/ Michael D. O'Halleran Director
______________________________________
MICHAEL D. O'HALLERAN
January 8, 2001
/s/ Melburn G. Whitmire Director
______________________________________
MELBURN G. WHITMIRE
January 8, 2001
</TABLE>
