UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of report (Date of earliest event reported) December 22, 2009

Cephalon, Inc.

(Exact Name of Registrant as Specified in Charter)

Delaware	0-19119	23-2484489
(State or Other Jurisdiction	(Commission	(IRS Employer
of Incorporation)	File Number)	Identification No.)

41 Moores Road
Frazer, Pennsylvania		19355
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s telephone number, including area code (610) 344-0200

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01 Entry into a Material Definitive Agreement.

Effective December 22, 2009, Cephalon, Inc. (the “Company”) entered into the Fourth Amendment (the “Amendment”) to the Credit Agreement dated as of August 15, 2008, among the Company, the lenders named in the Credit Agreement and JPMorgan Chase Bank, N.A., as administrative agent, as amended by that certain First Amendment to the Credit Agreement effective November 21, 2008, that certain Second Amendment to the Credit Agreement dated as of February 27, 2009 and that certain Third Amendment to the Credit Agreement dated as of May 21, 2009 (the “Credit Agreement”). The purpose of the Amendment is to revise the Credit Agreement such that the Company’s restructuring of certain foreign subsidiaries, as well any future restructuring of a similar nature and purpose by the Company, shall be permitted pursuant to the Credit Agreement.

The foregoing is qualified in its entirety by the full text of the Amendment, a copy of which is attached hereto as Exhibit 10.1 and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

Exhibit No.		Description

10.1		Fourth Amendment dated as of December 22, 2009 to the Credit Agreement dated as of August 15, 2008 among Cephalon, Inc., the lenders named therein, JPMorgan Chase Bank, N.A., as administrative agent, Deutsche Bank Securities Inc. and Bank of America N.A., as co-syndication agents, Wachovia Bank, N.A. and Barclays Bank plc, as co-documentation agents, and J.P. Morgan Securities Inc., Deutsche Bank Securities Inc. and Banc of America Securities LLC, as joint bookrunners and joint lead arrangers

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	CEPHALON, INC.


Date: December 29, 2009	By:	/s/ Gerald J. Pappert
		Gerald J. Pappert
		Executive Vice President and General Counsel

Exhibit Index

Exhibit No.		Description

10.1		Fourth Amendment dated as of December 22, 2009 to the Credit Agreement dated as of August 15, 2008 among Cephalon, Inc., the lenders named therein, JPMorgan Chase Bank, N.A., as administrative agent, Deutsche Bank Securities Inc. and Bank of America N.A., as co-syndication agents, Wachovia Bank, N.A. and Barclays Bank plc, as co-documentation agents, and J.P. Morgan Securities Inc., Deutsche Bank Securities Inc. and Banc of America Securities LLC, as joint bookrunners and joint lead arrangers