(POLYMEDICA LOGO)

INVESTOR CONTACT:
Keith W. Jones
Chief Financial Officer
(781) 933-2020


                     POLYMEDICA EXTENDS EXPIRATION DATE FOR
            PREVIOUSLY ANNOUNCED MODIFIED DUTCH AUCTION TENDER OFFER

WOBURN, MASSACHUSETTS - (June 24, 2005) - PolyMedica Corporation (NASDAQ/NM:
PLMD) announced today that it is increasing the purchase price of its previously
announced tender offer to repurchase up to $150 million of its common stock. The
new purchase price will not be less than $34.75 per share nor more than $37.50
per share. Previously, the price range of the tender offer was from $30.75 to
$34.50 per share. The Company is extending the expiration date of the tender
offer from 12:00 midnight, Eastern time, on June 23, 2005 to 12:00 midnight,
Eastern time, on July 8, 2005.

All shareholders will be receiving a new Letter of Transmittal. Shareholders
that have already tendered shares at a specified price must deliver a new Letter
of Transmittal to the Depositary if they wish to participate in the tender
offer. Shareholders that have already tendered their shares and indicated that
they would accept the final price determined by the Company in the tender offer
do not need to take any action unless they wish to change that direction.

ABOUT POLYMEDICA
PolyMedica Corporation is a leading provider of healthcare products and services
to patients suffering from chronic diseases. With over 700,000 active patients,
the Company is the nation's largest provider of blood glucose testing supplies
and related services to people with diabetes. In addition, PolyMedica provides
its patients with a full range of prescription medications through Liberty's
mail-order pharmacy. By communicating with patients on a regular basis,
providing the convenience of home delivery, and submitting claims for payment
directly to Medicare and other insurers on behalf of their patients, Liberty
provides a simple and reliable way for patients to obtain their supplies and
medications and encourages compliance with their physicians' orders. More
information about PolyMedica can be found on the Company's website at
www.polymedica.com.

This press release is for informational purposes only and does not constitute an
offer to buy or the solicitation of an offer to sell shares of PolyMedica
Corporation's common stock. The tender offer is being made only pursuant to the
Offer to Purchase and the related materials (as amended and supplemented) that
PolyMedica Corporation distributed to shareholders on May 26, 2005, as well as
the additional materials to be distributed to shareholders. Shareholders should
read all these materials carefully because they contain important information.
Shareholders can obtain a free copy of the Tender Offer Statement on Schedule
TO, the Offer to Purchase, the supplement to the Offer to Purchase and other
documents that PolyMedica Corporation filed with the Securities and Exchange
Commission at the Commission's website at


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(POLYMEDICA LOGO)


www.sec.gov. Shareholders may also obtain a copy of these documents, without
charge, from The Altman Group, Inc., the information agent for the tender offer,
toll free at 800-443-5182.

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