Exhibit 12

SCHERING-PLOUGH CORPORATION AND SUBSIDIARIES

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Three Months
	Ended		Years Ended December 31
	March 31, 2007		2006		2005			2004			2003			2002
	(Dollars in millions)
Income/(loss) before income taxes	$	652	$	1,483	$	497		$	(168	)	$	(46	)	$	2,563
Less: Equity income		487		1,459		873			347			54			—
Income/(loss) before income taxes and equity income		165		24		(376	)		(515	)		(100	)		2,563
Add: Fixed charges:
Preference dividends		22		86		86			34			—			—
Interest expense		37		172		163			168			81			28
One-third of rental expense		10		39		37			30			30			27
Capitalized interest		5		13		14			20			11			24
Total fixed charges		74		310		300			252			122			79
Less: Capitalized interest		5		13		14			20			11			24
Less: Preference dividends		22		86		86			34			—			—
Add: Amortization of capitalized interest		3		10		10			9			9			8
Add: Distributed income of equity investees		353		1,332		647			228			32			—
Earnings/(loss) before income taxes and fixed charges (other than capitalized interest)	$	568	$	1,577	$	481		$	(80	)	$	52		$	2,626
Ratio of earnings to fixed charges		7.7		5.1		1.6			(0.3	)*		0.4	**		33.2

*	For the year ended December 31, 2004, earnings were insufficient to cover fixed charges by $332 million.
**	For the year ended December 31, 2003, earnings were insufficient to cover fixed charges by $70 million.

“Earnings” consist of income/(loss) before income taxes and equity income, plus fixed charges (other than capitalized interest and preference dividends), amortization of capitalized interest and distributed income of equity investee. “Fixed charges” consist of interest expense, capitalized interest, preference dividends and one-third of rentals which Schering-Plough believes to be a reasonable estimate of an interest factor on leases.