================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                   -----------

                                 SCHEDULE TO / A

                                (AMENDMENT NO. 4)


                      Tender Offer Statement Under Section
           14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934

                        BORON, LEPORE & ASSOCIATES, INC.
                            (Name of Subject Company)

                              GARDEN MERGER CORP.,
                          a wholly owned subsidiary of
                              CARDINAL HEALTH, INC.
                       (Name of Filing Persons--Offerors)

                     COMMON STOCK, PAR VALUE $0.01 PER SHARE
                         (Title of Class of Securities)

                                   10001P 10 2
                      (CUSIP Number of Class of Securities)

                             Paul S. Williams, Esq.
           Executive Vice President, Chief Legal Officer and Secretary
                              Cardinal Health, Inc.
                               7000 Cardinal Place
                               Dublin, Ohio 43017
                            Telephone: (614) 757-5000
            (Name, Address and Telephone Number of Person Authorized
       to Receive Notices and Communications on Behalf of Filing Persons)

                                    Copy To:
                               David A. Katz, Esq.
                         Wachtell, Lipton, Rosen & Katz
                               51 West 52nd Street
                            New York, New York 10019
                            Telephone: (212) 403-1000

         Transaction Valuation*                  Amount of Filing Fee**
         ---------------------                   --------------------
              $212,420,768                             $19,542.71

*   Estimated for purposes of calculating the amount of the filing fee only, in
    accordance with Rule 0-11(d) under the Securities Exchange Act of 1934, as
    amended (the "Securities Exchange Act"). The calculation of the transaction
    valuation assumes the purchase of 11,706,903 outstanding shares of common
    stock of Boron, LePore & Associates, Inc. as of May 22, 2002, at a purchase
    price of $16.00 per share. The transaction valuation also includes the offer
    price of $16.00 multiplied by 1,569,395, the number of exercisable options
    (whether or not in the money) currently outstanding that could be tendered.

**  The amount of the filing fee, calculated in accordance with Section 13(e) of
    the Securities Exchange Act, equals $92 per million dollars of the
    transaction valuation. Sent by wire transfer, less amounts previously paid,
    to the Securities and Exchange Commission lockbox on June 11, 2002.

[_] Check the box if any part of the fee is offset as provided by Rule
    0-11(a)(2) and identify the filing with which the offsetting fee was
    previously paid. Identify the previous filing by registration statement
    number, or the Form or Schedule and the date of its filing.

    Amount Previously Paid:  None.                Filing Party:  Not applicable.
    Form or Registration No.:  Not applicable.    Date Filed:  Not applicable.

[_] Check the box if the filing relates solely to preliminary communications
    made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the
statement relates:

[X] third-party tender offer subject to Rule 14d-1.
[_] issuer tender offer subject to Rule 13e-4.
[_] going-private transaction subject to Rule 13e-3.
[_] amendment to Schedule 13D under Rule 13d-2.
Check the following box if the filing is a final amendment reporting the results
of the tender offer: [_]
================================================================================





      This Amendment No. 4 (the "Amendment") amends and supplements the Tender
Offer Statement on Schedule TO (the "Schedule TO"), filed with the Securities
and Exchange Commission (the "Commission") on May 24, 2002 by Cardinal Health,
Inc., an Ohio corporation ("Cardinal"), and Garden Merger Corp., a Delaware
corporation and a wholly owned subsidiary of Cardinal ("Subcorp"), as amended by
Amendment No. 1 filed with the Commission on May 28, 2002, Amendment No. 2 filed
with the Commission on May 30, 2002, and Amendment No. 3 filed with the
Commission on June 5, 2002 relating to the offer by Subcorp to purchase all
outstanding shares of common stock, par value $0.01 per share (the "Shares"), of
Boron, LePore & Associates, Inc., a Delaware corporation ("BLP") for $16.00 per
Share, net to the seller in cash, upon the terms and subject to the conditions
set forth in the Offer to Purchase, dated May 24, 2002 (the "Offer to Purchase")
and in the related Letter of Transmittal, copies of which were filed previously
with the Schedule TO as Exhibits (a)(1)(A) and (a)(1)(B), respectively (which,
together with any amendments or supplements to the Offer to Purchase and the
Letter of Transmittal, collectively constitute the "Offer").

ITEM 1.  SUMMARY TERM SHEET.

      The third bullet point under "Principle Terms" is hereby amended and
restated in its entirety to read as follows:

             "The initial offering period of the offer will expire at 12:00
      midnight, New York City time, on Monday, June 24, 2002 unless we extend
      the offer. We may, without the consent of BLP elect to provide a
      "subsequent offer period" of not less than three and no more than 20
      business days beginning immediately after the expiration date of the
      offer."

      The second bullet point under "Conditions" is hereby amended and
supplemented by adding the following disclosure at the end of such bullet point:

             "As of the date of the Amendment, we do not own any BLP shares
      either directly or indirectly."

ITEM 4.  TERMS OF THE OFFER.

      The second paragraph under the "Terms of the Offer" is hereby amended and
supplemented by adding the following at the end of the paragraph:

             "In the event that Subcorp elects to provide a Subsequent Offering
      Period, it will provide an announcement to that effect to a national news
      service no later than 9:00 a.m., New York City time, on the next business
      day after the previously scheduled Expiration Date. The Expiration Date
      for the Offer is currently scheduled for June 24, 2002."

      The third paragraph under the heading "5. Material United States Federal
Income Tax Consequences" is amended and restated in its entirety to read as
follows:

             "YOU ARE URGED TO CONSULT YOUR TAX ADVISOR WITH RESPECT TO THE
      SPECIFIC TAX CONSEQUENCES TO YOU OF THE OFFER, THE SUBSEQUENT OFFERING
      PERIOD (IF ONE IS PROVIDED) AND THE MERGER, INCLUDING UNITED STATES
      FEDERAL, STATE, LOCAL AND FOREIGN TAX CONSEQUENCES."

      The fifth paragraph under the heading "Purposes of the Offer; the Merger
Agreement; the Employment Agreements; Statutory Requirements; Appraisal Rights;
Plans for BLP; 'Going-Private' Transactions -- (c). Employment and
Confidentiality Agreements" is amended and supplemented by adding the following
disclosure at the end:

             "Because the date of the Merger cannot be determined, the amount
      each of Messrs. LePore, Freeman and Cherichella will receive cannot be
      determined. If the Merger were to occur on June 30, 2002, Messrs. LePore,
      Freeman and Cherichella would be entitled to receive $225,000, $187,500
      and $105,000, respectively, under the BLP Group Companies Executive Bonus
      Plan payable after December 31, 2002."





      The disclosure under the heading "Purposes of the Offer; the Merger
Agreement; the Employment Agreements; Statutory Requirements; Appraisal Rights;
Plans for BLP; 'Going-Private' Transactions -- (e). Appraisal Rights" is amended
and restated in its entirety to read as follows:

            (e) Appraisal Rights. No appraisal rights are available in
            connection with the Offer. If the Merger is consummated, however,
            the BLP stockholders that have not tendered their Shares will have
            certain rights under the DGCL to dissent and demand appraisal of,
            and to receive payment in cash of the fair value of, their Shares.
            BLP stockholders that perfect these rights by complying with the
            procedures set forth in Section 262 will have the fair value of
            their Shares (exclusive of any element of value arising from the
            accomplishment or expectation of the Merger) determined by the
            Delaware Court of Chancery and will be entitled to receive a cash
            payment equal to such fair value from the Surviving Corporation. In
            addition, such dissenting BLP stockholders (the "Dissenting
            Stockholders") would be entitled to receive payment of a fair rate
            of interest from the date of consummation of the Merger on the
            amount determined to be the fair value of their Shares (the
            "Dissenting Shares"). In determining the fair value of the
            Dissenting Shares, the court is required to take into account all
            relevant factors. Accordingly, the determination could be based upon
            considerations other than, or in addition to, the market value of
            the Shares, including, among other things, asset values and earning
            capacity. In Weinberger v. UOP, Inc., the Delaware Supreme court
            stated that "proof of value by any techniques or methods which are
            generally considered acceptable in the financial community and
            otherwise admissible in court" should be considered in an appraisal
            proceeding. The Weinberger court also noted that, under Section 262,
            fair value is to be determined "exclusive of any element of value
            arising from the accomplishment or expectation of the merger." In
            Cede & Co. v. Technicolor, Inc., however, the Delaware Supreme Court
            stated that, in the context of a two-step cash merger, "to the
            extent that value has been added following a change in majority
            control before cash-out, it is still value attributable to the going
            concern," to be included in the appraisal process. As a consequence,
            the fair value determined in any appraisal proceeding could be more
            or less than the consideration to be paid in the Offer and the
            Merger.

                  Cardinal does not intend to object, assuming the proper
            procedures are followed, to the exercise of appraisal rights by any
            Dissenting Stockholder and the demand for appraisal of, and payment
            in cash for the fair value of, the Dissenting Shares. Cardinal
            intends, however, to cause the Surviving Corporation to argue in an
            appraisal proceeding that, for purposes of such proceeding, the fair
            value of each Dissenting Share is less than the price paid in the
            Merger. In this regard, BLP stockholders should be aware that
            opinions of investment banking firms as to the fairness from a
            financial point of view (including the Bear Stearns opinion
            described in this Offer to Purchase) are not necessarily opinions as
            to fair value under Section 262.

                  THE PRESERVATION AND EXERCISE OF APPRAISAL RIGHTS REQUIRE
            STRICT ADHERENCE TO THE APPLICABLE PROVISIONS OF THE DGCL WHICH WILL
            BE PROVIDED TO BLP STOCKHOLDERS WHO DO NOT TENDER SHARES INTO THE
            OFFER. BLP STOCKHOLDERS WHO TENDER SHARES IN THE OFFER WILL NOT HAVE
            APPRAISAL RIGHTS.


      The paragraph under the heading "12. Source and Amount of Funds." is
amended and restated in its entirety to read as follows:

             "This Offer is not conditioned upon Cardinal's or Subcorp's ability
      to finance the purchase of Shares pursuant to the Offer. Subcorp estimates
      that the total amount of funds required to purchase all outstanding Shares
      pursuant to the Offer and to complete the Merger and to pay related fees
      and expenses will be approximately $210 million. Cardinal has available
      the necessary funds from its ongoing free cash flow and will cause Subcorp
      to have sufficient funds available to complete the Offer and the Merger."




      The first paragraph under the heading "14. Conditions to the Offer." is
amended and restated in its entirety to read as follows:

             "Notwithstanding any other provisions of the Offer (subject to the
      terms and conditions of the Merger Agreement and any applicable rules and
      regulations of the Commission, including Rule 14e-1(c) promulgated under
      the Securities Exchange Act), Subcorp shall not be required to accept for
      payment or pay for, and may delay the acceptance for payment of, any
      Shares, if (A) there shall not be validly tendered and not properly
      withdrawn prior to the Expiration Date that number of Shares that
      represents at least 7,942,530 Shares, representing approximately 50.1% of
      the outstanding Shares on a fully diluted basis (without giving effect to
      the transactions contemplated by the Subcorp Option) on the date of
      purchase, (B) any applicable waiting period under the HSR Act shall not
      have expired or been terminated prior to the Expiration Date (which
      waiting period was terminated on May 28, 2002) or any other required
      waiting periods, clearances or approvals of any Governmental Authority
      shall not have been obtained, or (iii) at any time on or after the date of
      the Merger Agreement and prior to the expiration of the Offer, any of the
      following conditions shall have occurred and continued to exist:"

      The first paragraph on page 32 within the heading "Conditions to the
Offer" is amended and restated in its entirety to read as follows:

             "The foregoing conditions are for the sole benefit of Cardinal and
      Subcorp, may be asserted by Cardinal or Subcorp, regardless of the
      circumstances giving rise to any such conditions, and, except for the
      Minimum Condition, may be waived by Cardinal or Subcorp in whole or in
      part at any time and from time to time prior to the expiration of the
      Offer, subject to the terms of the Merger Agreement. The failure by
      Cardinal or Subcorp at any time to exercise any of the foregoing rights
      shall not be deemed a waiver of any such right and, each such right shall
      be deemed an ongoing right that may be asserted at any time and from time
      to time prior to the expiration of the Offer."

ITEM 11.  ADDITIONAL INFORMATION.

      Item 11 of the Schedule TO is hereby amended and supplemented by the
following:

             On June 10, 2002, the putative class action complaint that had
      purportedly been filed against BLP, BLP's Board of Directors and Cardinal
      was withdrawn and terminated by the plaintiff and plaintiff's counsel
      without the payment of any costs, expenses or consideration of any kind by
      BLP, Cardinal or any of the other defendants.






                                    SIGNATURE

      After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this Schedule TO is true, complete and
correct.

      Dated:  June 11, 2002

                                    GARDEN MERGER CORP.


                                    By  /s/ Paul S. Williams
                                      ----------------------------
                                      Name:   Paul S. Williams
                                      Title:  Executive Vice President,
                                              Chief Legal Officer and Secretary


                                    CARDINAL HEALTH, INC.


                                    By  /s/ Paul S. Williams
                                      ----------------------------
                                      Name:  Paul S. Williams
                                      Title: Executive Vice President,
                                             Chief Legal Officer and Secretary