Date:5/20/2011

ments regarding anticipated scientific progress on its research programs; development of potential pharmaceutical products; interpretation of clinical results; prospects for regulatory approval; manufacturing development and capabilities; market prospects for its products; and other statements regarding matters that are not historical facts. You may identify some of these forward-looking statements by the use of words in the statements such as "anticipate," "estimate," "expect," "project," "intend," "plan," "believe" or other words and terms of similar meaning. Cephalon performance and financial results could differ materially from those reflected in these forward-looking statements due to general financial, economic, regulatory and political conditions affecting the biotechnology and pharmaceutical industries as well as more specific risks and uncertainties facing Cephalon such as those set forth in its reports on Form 8-K, 10-Q and 10-K filed with the U.S. Securities and Exchange Commission. Given these risks and uncertainties, any or all of these forward-looking statements may prove to be incorrect. Therefore, you should not rely on any such factors or forward-looking statements. Furthermore, Cephalon does not intend to update publicly any forward-looking statement, except as required by law. The Private Securities Litigation Reform Act of 1995 permits this discussion.

Contacts:

Media:
Fritz Bittenbender
610-883-5855 (office)

610-457-7041 (cell)
fbittenb@cephalon.com

Natalie de Vane
610-727-6536 (office)
610-999-8756 (cell)
ndevane@cephalon.com

Investor Relations:
Chip Merritt
610-738-6376 (office)
cmerritt@cephalon.com

Joseph Marczely
610-883-5894 (office)
jmarczely@cephalon.com

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SOURCE Cephalon, Inc. Copyright©2010 PR Newswire. All rights reserved

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