Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in Registration StatementsNo. 2-83963,No. 33-50606,No. 333-30331,No. 333-87077,No. 333-91440,No. 333-104714,No. 333-105567,No. 333-105568,No. 333-112421,No. 333-121089 andNo. 333-134281 onForm S-8, Post Effective Amendment No. 1 to Registration StatementNo. 2-84723 onForm S-8, Post Effective Amendment No. 1 to Registration StatementNo. 333-105567 onForm S-8, and Registration StatementsNo. 333-12909,No. 333-30355,No. 333-113222 andNo. 333-145055 onForm S-3 of our reports dated February 29, 2008, relating to (i) the consolidated financial statements and financial statement schedule of Schering-Plough Corporation and subsidiaries (which report expressed an unqualified opinion and included an explanatory paragraph regarding the Company’s adoption of Statement of Financial Accounting Standards (“SFAS”) No. 123 (Revised 2004),Share-Based Payment, SFAS No. 158,Employers’ Accounting for Defined Benefit Pension and Other Postretirement Plans, and Financial Accounting Standards Board Interpretation No. 48,Accounting for Uncertainty in Income Taxes) and (ii) the effectiveness of Schering-Plough Corporation and subsidiaries’ internal control over financial reporting appearing in this Annual Report onForm 10-K/A of Schering-Plough Corporation and subsidiaries for the year ended December 31, 2007.
/s/ DELOITTE & TOUCHE LLP
Parsippany, New Jersey
March 3, 2008
142