1 Exhibit 23(a) INDEPENDENT AUDITOR'S CONSENT We consent to the incorporation by reference in this Registration Statement of Cardinal Health, Inc. (formerly known as Cardinal Distribution, Inc.) on Form S-8 of our report dated May 11, 1993, except for Note 14, as to which the date is June 11, 1993, and except for Notes 1 and 7, as to which the date is August 6, 1993, appearing in the amended Annual Report on Form 10-K/A of Cardinal Health, Inc. for the year ended March 31, 1993, and of our report dated February 10, 1994 appearing in the Current Report on Form 8-K of Cardinal Health, Inc. dated February 11, 1994. /s/ Deloitte & Touche - ----------------------- DELOITTE & TOUCHE Columbus, Ohio March 3, 1994