IMPAX Laboratories, Inc. Agrees to Sell $75 Million of 3.5% Senior Subordinated Convertible Debentures Due 2012; Proceeds to be

IMPAX Laboratories, Inc. (Nasdaq:IPXLE) today announced
that it has entered into a definitive agreement to sell $75 million
aggregate principal amount of 3.50% senior subordinated convertible
debentures due 2012 (the "3.50% Debentures") to a qualified
institutional buyer in a private placement under the Securities Act of
1933. The closing is expected to occur today.
   In addition, IMPAX announced that it received a notice from a
holder of more than 25% aggregate principal amount of IMPAX's 1.250%
convertible senior subordinated debentures due 2024 (the "1.25%
Debentures") declaring the principal of and premium, if any, on all
the 1.25% Debentures, and the interest accrued thereon, to be due and
payable immediately. As previously announced, IMPAX received a notice,
dated April 22, 2005, from a holder stating that IMPAX failed to file
its Annual Report on Form 10-K for the year ended December 31, 2004
with the SEC, as required by the Indenture governing the 1.25%
Debentures, and requiring that IMPAX remedy such default. IMPAX's
failure to file the Annual Report within 60 days after the date of the
notice constituted an "event of default" under the Indenture.
Accordingly, the $95 million aggregate principal amount of the 1.25%
Debentures, together with accrued interest thereon, has become due and
payable.
   The net proceeds of the sale of the 3.50% Debentures, together
with Impax's existing funds, are being used to repay the 1.25%
Debentures. As previously announced, IMPAX's available cash reserves
as of May 31, 2005 were approximately $78 million.
   The 3.50% Debentures are senior subordinated, unsecured
obligations of IMPAX and bear interest at the rate of 3.50% per annum.
The 3.50% Debentures mature on June 15, 2012 and may not be redeemed
by IMPAX prior to maturity. Holders also have the right to require
IMPAX to repurchase all or any portion of the 3.50% Debentures on June
15, 2009.
   During certain periods and subject to certain conditions, the
3.50% Debentures will be convertible into a combination of cash, in a
minimum amount equal to the principal amount of the 3.50% Debentures,
and IMPAX common stock at an initial conversion price per share equal
to 130% of the arithmetic average of the closing prices of IMPAX
common stock for the ten trading day period from and including June
20, 2005.
   IMPAX has also entered into a registration rights agreement with
the purchaser under which it is required to register the 3.50%
Debentures, and the shares of common stock into which they are
convertible, within 60 days of filing the Annual Report on Form 10-K
for the year ended December 31, 2004, but in any event within 270 days
of the closing, and to have the registration statement declared
effective within 90 days of its filing, but in any event, within 360
days of the closing.
   The foregoing description of the 3.50% Debentures is only a
summary of their principal terms. The form of Indenture governing the
3.50% Debentures and setting forth their terms in full is included as
an exhibit to a Current Report on Form 8-K being filed by the Company
concurrently with this announcement.
   This announcement is neither an offer to sell nor a solicitation
to buy any of the 3.50% Debentures and shall not constitute an offer,
solicitation or sale in any jurisdiction in which such offer,
solicitation or sale is unlawful.
   The 3.50% Debentures being offered and the common stock issuable
upon conversion of the 3.50% Debentures have not been registered under
the Securities Act, or any state securities laws, and may not be
offered or sold in the United States absent registration under, or an
applicable exemption from the registration requirements of, the
Securities Act and applicable state securities laws.

   IMPAX Laboratories, Inc. is a technology-based specialty
pharmaceutical company applying its formulation expertise and drug
delivery technology to the development of controlled-release and
specialty generics in addition to the development of branded products.
IMPAX markets generic products through its Global Pharmaceuticals
division and intends to market its products through the IMPAX
Pharmaceuticals division. Additionally, where strategically
appropriate, IMPAX has developed marketing partnerships to fully
leverage its technology platform. IMPAX Laboratories is headquartered
in Hayward, California, and has a full range of capabilities in its
Hayward and Philadelphia facilities. For more information, please
visit the Company Web site at: www.impaxlabs.com.

   "Safe Harbor" statement under the Private Securities Litigation
   Reform Act of 1995:

   To the extent any statements made in this news release contain
information that is not historical, these statements are
forward-looking in nature and express the beliefs and expectations of
management. Such statements are based on current expectations and
involve a number of known and unknown risks and uncertainties that
could cause Impax's future results, performance or achievements to
differ significantly from the results, performance or achievements
expressed or implied by such forward-looking statements. Such risks
and uncertainties include, but are not limited to, possible adverse
effects resulting from Impax's delay in filing its 2004 Form 10-K and
first-quarter 2005 Form 10-Q, possible delisting from the NASDAQ
National Market, Impax's ability to obtain sufficient capital to fund
its operations, the difficulty of predicting FDA filings and
approvals, consumer acceptance and demand for new pharmaceutical
products, the impact of competitive products and pricing, Impax's
ability to successfully develop and commercialize pharmaceutical
products, Impax's reliance on key strategic alliances, the uncertainty
of patent litigation, the availability of raw materials, the
regulatory environment, dependence on patent and other protection for
innovative products, exposure to product liability claims,
fluctuations in operating results and other risks detailed from time
to time in Impax's filings with the Securities and Exchange
Commission. Forward-looking statements speak only as to the date on
which they are made, and Impax undertakes no obligation to update
publicly or revise any forward-looking statement, regardless of
whether new information becomes available, future developments occur
or otherwise.