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Prospectus Supplement No. 14                   Filed Pursuant to Rule 424(b)(3)
(To Prospectus Dated September 6, 2001)           Commission File No. 333-68278


                          AMERISOURCEBERGEN CORPORATION

                         AMERISOURCE HEALTH CORPORATION

$300,000,000 Principal Amount of 5% Convertible Subordinated Notes Due December
2007 and 5,663,730 Shares of Common Stock Issuable Upon Conversion of the Notes

This prospectus supplement relates to the resale by the holders of 5%
Convertible Subordinated Notes Due December 1, 2007 of AmerisourceBergen
Corporation and AmeriSource Health Corporation and the shares of common stock,
$.01 par value per share, of AmerisourceBergen Corporation issuable upon the
conversion of the notes.

This prospectus supplement should be read in conjunction with, and may not be
delivered or utilized without, the prospectus dated September 6, 2001, including
any amendments or supplements thereto. The terms of the notes are set forth in
the prospectus.

The information in the table appearing under the heading "Selling
Securityholders" in the prospectus is amended by adding the information below
with respect to persons not previously listed in the prospectus or in any
amendments or supplements thereto, and by superceding the information with
respect to persons previously listed in the prospectus or in any amendments or
supplements thereto that are listed below:

                                                          Shares of
                                  Amount of                Common
                                    Notes                   Stock
                                    Owned     Amount of     Owned      Shares
                                   Before    Notes that     Before   that May be
            Name                  Offering   May be Sold   Offering     Sold
----------------------------      --------   -----------   --------   ---------

HT Insight Convertible
    Fund ...................     $ 100,000    $ 100,000       0        1,888

Univar USA Inc.
    Retirement Plan ........     $ 125,000    $ 125,000       0        2,360

                           ---------------------------

The securities offered by the prospectus involve a high degree of risk. See
"Risk Factors" beginning on page 9 of the prospectus.

                           ---------------------------

    Neither the Securities and Exchange Commission nor any state securities
    commission has approved or disapproved of these securities or determined
    if this prospectus supplement or the prospectus is truthful or complete.
           Any representation to the contrary is a criminal offense.

          The Date of this Prospectus Supplement is December 19, 2002.