X0202 4 2007-12-19 0000873364 CEPHALON INC CEPH 0001209720 VAUGHT JEFFRY L 41 MOORES RD. FRAZER PA 19355 0 1 0 0 Exec. VP & Pres., R&D Common Stock 2007-12-19 4 F 0 1505 73.90 D 65942 D Common Stock 190 I by Trust Shares withheld pursuant to exercise of tax withholding right under Cephalon, Inc. 2004 Equity Compensation Plan. Carolyn S. Iosca, Attorney-in-Fact For: Jeffry L. Vaught 2007-12-20