Impax Laboratories Confirms Patent Challenge Relating to ORACEA(R) Delayed-Release Capsules, 40mg

September 21, 2009

HAYWARD, Calif.--(BUSINESS WIRE)--Sep. 21, 2009-- Impax Laboratories, Inc. today confirms that it has initiated a challenge of the patents listed by Galderma Laboratories, L.P. in connection with its ORACEA® (doxycycline) delayed-release capsules, 40 mg.

Impax filed its Abbreviated New Drug Application (“ANDA”) containing a paragraph IV certification for a generic version of ORACEA® with the U.S. Food & Drug Administration (“FDA”). Following receipt of the notice from the FDA that Impax’s ANDA had been accepted for filing, Impax notified the New Drug Application holder and patent owners of its paragraph IV certification.

On September 18, 2009, The Research Foundation of State University of New York; New York University; Galderma Laboratories Inc.; and Galderma Laboratories, L.P. filed suit for patent infringement against Impax in the United States District Court for the District of Delaware. This action formally initiates the patent challenge process under the Hatch-Waxman Act.

Once the ANDA is approved by FDA, Global Pharmaceuticals, Impax’s generic division, will commercialize the product.

ORACEA® is indicated for the treatment of only inflammatory lesions (papules and pustules) of rosacea in adult patients. According to Wolters Kluwer Health, U.S. sales of ORACEA® were approximately $104 million for the twelve-month period ending July 2009.

About Impax Laboratories, Inc.

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 its generic products through its Global Pharmaceuticals division and markets its branded 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's 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 the Company’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; ability to timely file periodic reports required by the Exchange Act; ability to maintain an effective system of internal control over financial reporting; ability to sustain profitability and positive cash flows; ability to maintain sufficient capital to fund operations; any delays or unanticipated expenses in connection with the construction of our Taiwan facility; ability to successfully develop and commercialize pharmaceutical products; the uncertainty of patent litigation; consumer acceptance and demand for new pharmaceutical products; the impact of competitive products and pricing; the difficulty of predicting Food and Drug Administration filings and approvals; inexperience in conducting clinical trials and submitting new drug applications; reliance on key alliance agreements; the availability of raw materials; the regulatory environment; exposure to product liability claims; fluctuations in operating results and other risks described in our Annual Report on Form 10-K for the year ended December 31, 2008. 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.

Source: Impax Laboratories, Inc.

Impax Laboratories, Inc.
Mark Donohue, 215-933-3526
Sr. Director Investor Relations
www.impaxlabs.com