On April 29, 2009, the Registrant issued an earnings release announcing its financial results for the three month period ended March 31, 2009. A copy of the earnings release is furnished as Exhibit 99.1.

This earnings press release includes financial measures that are not in conformity with accounting principles generally accepted in the United States. We refer to these as non-GAAP financial measures. Specifically, the release refers to adjusted statements of operations and adjusted diluted earnings per share.

The adjusted statements of operations and adjusted diluted earnings per share are non-GAAP financial measures. These non-GAAP financial measures are not prepared in accordance with accounting principles generally accepted in the United States and may be different from non-GAAP financial measures used by other companies. Endo refers to these non-GAAP financial measures in making operating decisions because it believes they provide meaningful supplemental information regarding the company's operational performance. For instance, Endo believes that these non-GAAP financial measures facilitate its internal comparisons to its historical operating results and comparisons to competitors' results. The company includes these non-GAAP financial measures in its earnings announcements because it believes they are useful to investors in allowing for greater transparency related to supplemental information used by Endo in its financial and operational decision-making. In addition, Endo has historically reported similar non-GAAP financial measures to its investors and believes that the inclusion of comparative numbers provides consistency in its financial reporting at this time. Further, Endo believes that these non-GAAP financial measures may be useful to investors as it is aware that certain of its significant stockholders utilize these measures to evaluate its financial performance. Finally, these measures are considered by the Compensation Committee of Endo's Board of Directors in assessing the performance and compensation of substantially all of its employees, including its executive officers. Investors are encouraged to review the reconciliation of the non-GAAP financial measures used in this earnings announcement to their most directly comparable GAAP financial measures as provided with the financial statements included in this press release.

The information in this Item 2.02 and in Exhibit 99.1 shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. The information contained in this Item 2.02 and in Exhibit 99.1 shall not be incorporated into any registration statement or other document filed with the Securities and Exchange Commission by the company, whether made before or after the date hereof, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing.

(a) Financial Statements of Business Acquired.

Not applicable.

(b) Pro Forma Financial Information.

Not applicable.

(c) Shell Company Transactions

Not applicable.

(d) Exhibits.

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Exhibit
Number      Description
99.1        Press Release of Endo Pharmaceuticals Holdings Inc. dated April 29,
            2009, reporting the Registrant's financial results for the three month
            period ended March 31, 2009