
<PAGE>
                                                                  Exhibit (a)(7)

    This announcement is neither an offer to purchase nor a solicitation of an
offer to sell Shares (as defined below). The Offer (as defined below) is made
solely by the Offer to Purchase dated July 7, 1999, and the related Letter of
Transmittal, and is being made to all holders of Shares. The Offer is not being
made to (nor will tenders be accepted from or on behalf of) holders of Shares in
any jurisdiction in which the nature of the Offer or the acceptance thereof
would not be in compliance with the laws of such jurisdiction. In any
jurisdiction where the securities, blue sky or other laws require the Offer to
be made by a licensed broker or dealer, the Offer shall be deemed to be made on
behalf of Purchaser by one or more registered brokers or dealers licensed under
the laws of such jurisdiction.

                      NOTICE OF OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                       (INCLUDING THE ASSOCIATED RIGHTS)
                                       OF
                             ADFLEX SOLUTIONS, INC.
                                       AT
                              $3.80 NET PER SHARE
                                       BY
                           INNOVEX ACQUISITION CORP.,
                          A WHOLLY OWNED SUBSIDIARY OF
                                 INNOVEX, INC.

    Innovex Acquisition Corp., a Delaware corporation ("Purchaser"), which is a
wholly owned, direct subsidiary of Innovex, Inc., a Minnesota corporation
("Parent"), is offering to purchase all outstanding shares of common stock, par
value $.01 per share (the "Common Stock"), of ADFlex Solutions, Inc., a Delaware
corporation (the "Company"), including the associated rights (the "Rights," and
together with the Common Stock, the "Shares") at a price of $3.80 per Share, net
to each tendering stockholder in cash, without interest (the "Offer Price"),
upon the terms and subject to the conditions set forth in the Offer to Purchase
dated July 7, 1999 (the "Offer to Purchase") and in the related Letter of
Transmittal (which together with the Offer to Purchase constitute the "Offer").

  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
        TIME, ON TUESDAY, AUGUST 3, 1999, UNLESS THE OFFER IS EXTENDED.

    The Offer is being made pursuant to the terms of the Merger Agreement dated
as of July 1, 1999 (the "Merger Agreement"), by and among the Company, Parent
and Purchaser. The Merger Agreement provides, among other things, for the making
of the Offer by Purchaser and further provides that, following the purchase of
Shares pursuant to the Offer and promptly after the satisfaction or waiver of
certain other conditions, the Purchaser will be merged with and into the Company
(the "Merger"). The Company will continue as the surviving corporation after the
Merger (the "Surviving Corporation") and will be a wholly owned subsidiary of
Parent. At the effective time of the Merger (the "Effective Time"), each
outstanding Share (other than Shares with respect to which appraisal rights are
properly exercised under Delaware law, Shares held in the treasury of the
Company or any subsidiary or Shares owned by Parent, Purchaser or any other
direct or indirect wholly owned subsidiary of Parent) will be converted into the
right to receive the Offer Price, net to the holder in cash, without interest.
<PAGE>
    At the Effective Time, all Shares will be canceled and retired and will
cease to exist, and each certificate formerly representing such Shares will
thereafter represent only the right to receive the Offer Price.

    Concurrently with the execution of the Merger Agreement, one stockholder
(the "Tendering Stockholder") entered into an agreement with Parent and
Purchaser, pursuant to which the Tendering Stockholder has agreed to tender (and
not withdraw), pursuant to and in accordance with the terms of the Offer, all
Shares that are owned of record or beneficially by such Tendering Stockholder
and to vote such Shares to approve and adopt the Merger Agreement, the Merger
and all agreements relating to the Merger. The Tendering Stockholder
beneficially owns 1,392,347 Shares representing 15.5% of the total outstanding
Shares (excluding options).

    THE BOARD OF DIRECTORS OF THE COMPANY UNANIMOUSLY HAS DETERMINED THAT THE
MERGER AGREEMENT, THE OFFER AND THE MERGER ARE FAIR TO AND IN THE BEST INTERESTS
OF THE COMPANY AND ITS STOCKHOLDERS, HAS APPROVED THE MERGER AGREEMENT AND THE
TRANSACTIONS CONTEMPLATED THEREBY, INCLUDING THE OFFER AND THE MERGER, AND
RECOMMENDS THAT THE STOCKHOLDERS ACCEPT THE OFFER.

    The Offer is conditioned upon, among other things, the satisfaction or
waiver of certain conditions to the obligations of Purchaser, Parent and the
Company to consummate the transactions contemplated by the Merger Agreement,
including (i) there being validly tendered by the Expiration Date and not
withdrawn that number of Shares that constitutes a majority of the total of the
then outstanding Shares (including for purposes of this calculation all Shares
issuable upon exercise of all vested options and all options that will vest on
or before December 31, 1999 and conversion of convertible securities or other
rights to purchase or acquire Shares (the "Minimum Condition")), (ii) receipt by
Purchaser, Parent and the Company of certain governmental and regulatory
approvals and (iii) certain other conditions. Consummation of the Offer is not
subject to any financing condition.

    Upon the terms and subject to the conditions of the Offer (including, if the
Offer is extended or amended, the terms and conditions of any such extension or
amendment), Purchaser will accept for payment and pay for all Shares validly
tendered on or prior to the Expiration Date and not withdrawn in accordance with
the provisions set forth in the Offer to Purchase. The term "Expiration Date"
shall mean Midnight, New York City time, on Tuesday, August 3, 1999, unless and
until Purchaser, subject to restrictions contained in the Merger Agreement,
shall from time to time have extended the period of time during which the Offer
is open, in which event the term "Expiration Date" shall mean the latest time
and date at which the Offer, as so extended by Purchaser, shall expire.

    Any extension by Purchaser shall be effective by giving oral or written
notice of such extension to EquiServe, L.P. as depositary (the "Depositary").
During any such extension, all Shares previously tendered and not withdrawn will
remain subject to the Offer, subject to the rights of a tendering stockholder to
withdraw such stockholder's Shares. If Purchaser extends the Offer or if
Purchaser (whether before or after its acceptance for payment of Shares) is
delayed in its payment for Shares or is unable to pay for Shares pursuant to the
Offer for any reason, then, without prejudice to Purchaser's rights under the
Offer, the Depositary may retain tendered Shares on behalf of Purchaser, and
such Shares may not be withdrawn except to the extent tendering stockholders are
entitled to withdrawal rights as described in the Offer to Purchase. However,
the ability of Purchaser to delay payment for Shares that Purchaser has accepted
for payment is limited by Rule 14e-1(c) under the Securities Exchange Act of
1934, as amended (the "Exchange Act").

    In all cases, payment for Shares tendered and accepted for payment pursuant
to the Offer will be made only after timely receipt by the Depositary of (i) the
certificates representing Shares (or timely book-entry confirmation of the
book-entry transfer of such Shares into the Depositary's account at the
Book-Entry Transfer Facility (as defined in the Offer to Purchase) pursuant to
the procedures set forth

                                       2
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in the Offer to Purchase), (ii) the Letter of Transmittal (or facsimile thereof)
properly completed and duly executed, together with any required signature
guarantees, or an Agent's Message (as defined in the Offer to Purchase) in
connection with a book-entry transfer and (iii) any other documents required by
the Letter of Transmittal, at one of its addresses set forth on the back cover
of the Offer to Purchase.

    Pursuant to the Merger Agreement, Purchaser may increase the Offer Price and
may make any other changes in the terms and conditions of the Offer, provided
that, without the prior written consent of the Company, Purchaser will not, and
Parent will cause Purchaser not to, (i) decrease or change the form of the Offer
Price, (ii) decrease the number of Shares subject to the Offer, (iii) amend or
waive the Minimum Condition or impose conditions other than those set forth in
the Merger Agreement, (iv) except as provided in the next paragraph, extend the
Expiration Date or (v) amend any term of the Offer in any manner materially
adverse to holders of Shares.

    Purchaser may, without the consent of the Company, (i) extend the Offer from
time to time if at the initial Expiration Date or any extension thereof any of
the conditions to the Offer shall not have been satisfied or waived, until such
time as such conditions are satisfied or waived but not beyond December 31, 1999
and (ii) extend the Offer for any period required by any rule, regulation,
interpretation or position of the Securities and Exchange Commission or the
staff thereof applicable to the Offer but not beyond December 31, 1999.
Purchaser will, from time to time, at the request of the Company, extend the
Offer if at any scheduled Expiration Date any condition has not been satisfied
or waived until such time as the conditions are satisfied or waived; provided,
however, that Purchaser shall not be required to extend the Offer beyond
December 31, 1999.

    Shares tendered may be withdrawn at any time prior to the Expiration Date.
Thereafter, such tenders are irrevocable, except that Shares tendered may be
withdrawn at any time after September 4, 1999 if such Shares have not been
accepted for payment as provided in this Offer to Purchase.

    For a withdrawal to be effective, a written, telegraphic or facsimile
transmission notice of withdrawal must be timely received by the Depositary at
one of its addresses set forth on the back cover of the Offer to Purchase. Any
notice of withdrawal must specify the name of the person who tendered the Shares
to be withdrawn, the number of Shares to be withdrawn and the name of the
registered holder of the Shares to be withdrawn, if different from that of the
person who tendered such Shares. If Share certificates evidencing Shares to be
withdrawn have been delivered or otherwise identified to the Depositary, then,
prior to the physical release of such Share certificates, the serial numbers
shown on such Share certificates must be submitted to the Depositary and, unless
such Shares have been tendered by an Eligible Institution (as defined in the
Offer to Purchase), the signature(s) on the notice of withdrawal must be
guaranteed by an Eligible Institution. If Shares have been tendered pursuant to
the procedure for book-entry transfer as set forth in the Offer to Purchase, any
notice of withdrawal must specify the name and number of the account at the
Book-Entry Transfer Facility to be credited with the withdrawn Shares and
otherwise comply with the Book-Entry Transfer Facility's procedures for
withdrawal, in which case a notice of withdrawal will be effective if delivered
to the Depositary by any method of delivery described in the first sentence of
this paragraph.

    All questions as to the form and validity (including the time of receipt) of
any notice of withdrawal will be determined by Purchaser in its sole discretion,
and its determination will be final and binding. None of Purchaser, Parent, the
Depositary, the Information Agent or any other person will be under any duty to
give notice of any defects or irregularities in any notice of withdrawal, nor
shall any of them incur any liability for failure to give any such notice.

    Withdrawals of tenders of Shares may not be rescinded, and any Shares
properly withdrawn will thereafter be deemed not validly tendered for purposes
of the Offer. However, withdrawn Shares may be retendered by following one of
the procedures described in the Offer to Purchase at any time on or prior to the
Expiration Date.

                                       3
<PAGE>
    The Company has provided Purchaser with the Company's stockholder list and
security position listings for the purpose of disseminating the Offer to holders
of Shares. The Offer to Purchase and the Letter of Transmittal and other
relevant materials will be mailed to record holders of Shares whose names appear
on the Company's stockholder list and will be furnished to brokers, dealers,
commercial banks, trust companies and similar persons whose names, or the names
of whose nominees, appear on the stockholder list or, if applicable, who are
listed as participants in a clearing agency's security position listing for
subsequent transmittal to beneficial owners of shares.

    The information required to be disclosed by Rule 14d-6(e)(1)(vii) of the
General Rules and Regulations under the Exchange Act is contained in the Offer
to Purchase and is incorporated herein by reference.

    THE OFFER TO PURCHASE AND THE LETTER OF TRANSMITTAL CONTAIN IMPORTANT
INFORMATION THAT SHOULD BE READ CAREFULLY BEFORE ANY DECISION IS MADE WITH
RESPECT TO THE OFFER.

    Requests for copies of the Offer to Purchase, the Letter of Transmittal and
other materials related to the Offer may be directed to the Information Agent as
set forth below, and copies will be furnished promptly at Purchaser's expense.
Questions or requests for assistance may be directed to the Information Agent.

                    The Information Agent for the Offer is:

                            MacKenzie Partners, Inc.
                                156 Fifth Avenue
                            New York, New York 10010
                         (212) 929-5500 (Call Collect)
                                       or
                         CALL TOLL FREE (800) 322-2885

July 7, 1999

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