IMPAX Announces Dismissal of Lawsuit Related to Generic Concerta(R)

October 03, 2006

HAYWARD, Calif.--(BUSINESS WIRE)--Oct. 3, 2006--IMPAX Laboratories, Inc. (OTC:IPXL) today announced that it and ALZA Corporation and McNeil-PPC have filed with the court a signed stipulation for the dismissal of a patent infringement lawsuit related to the Company's Abbreviated New Drug Application (ANDA) for methylphenidate hydrocholoride ER, 18, 27, 36, 54 mg. tablets, generic of Concerta(R). Alza Corporation and McNeil-PPC filed the suit against the Company last year in United States District Court for the District of Delaware. The Company's ANDA remains under review by FDA as well as a Citizen's Petition filed by McNeil relating to approval criteria for Concerta generics.

Concerta is marketed by McNeil Consumer & Specialty Pharmaceuticals, a division of Johnson & Johnson, as a once-daily treatment for attention deficit disorder/attention deficit hyperactivity disorder. According to Wolters Kluwer Health, U.S. sales of Concerta tablets were approximately $846 million in the 12 months ended July 2006.

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, Calif., and has a full range of capabilities in its Hayward and Philadelphia facilities. For more information, please visit the Company's Web site at:

"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 the delisting of IMPAX's stock, IMPAX's delay in filing its 2004 Form 10-K, its Form 10-Q for each of the first three quarters of 2005, its Form 10-K for 2005, and its Form 10-Q for each of the first two quarters of 2006, 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.

CONTACT: IMPAX Laboratories, Inc.
Larry Hsu, Ph.D.,
510-476-2000, Ext. 1111
Arthur Koch,
Investor Relations Contacts:
Lippert/Heilshorn & Associates, Inc.
Kim Sutton Golodetz,
Bruce Voss,

SOURCE: IMPAX Laboratories, Inc.