Exhibit 12

MERCK SHARP & DOHME CORP. AND SUBSIDIARIES

Computation of Ratios of Earnings to Fixed Charges

($ in millions except ratio data)

		Years Ended December 31,
		2009				2008				2007				2006				2005
Income Before Taxes		$	7,952.3			$	9,931.7			$	3,492.1			$	6,341.9			$	7,485.7
Add (Subtract):
One-third of rents			65.1				74.8				66.4				67.8				68.2
Interest expense, gross			429.6				251.3				384.3				375.1				385.5
Interest capitalized, net of amortization			26.8				40.9				31.8				29.4				(1.0	)
Equity (income) loss from affiliates, net of distributions			(472.1	)			(493.7	)			(454.3	)			(362.5	)			(615.9	)
Earnings as defined		$	8,001.7			$	9,805.0			$	3,520.3			$	6,451.7			$	7,322.5
One-third of rents		$	65.1			$	74.8			$	66.4			$	67.8			$	68.2
Interest expense, gross			429.6				251.3				384.3				375.1				385.5
Preferred stock dividends			160.9				145.0				158.1				166.0				166.7
Fixed Charges		$	655.6			$	471.1			$	608.8			$	608.9			$	620.4
Ratio of Earnings to Fixed Charges			12				21				6				11				12

For purposes of computing these ratios, “earnings” consist of income from continuing operations before taxes, one-third of rents (deemed by the Company to be representative of the interest factor inherent in rents), interest expense, net of amounts capitalized and equity (income) loss from affiliates, net of distributions. “Fixed charges” consist of one-third of rents, interest expense as reported in the consolidated financial statements and dividends on preferred stock. Interest expense does not include interest related to uncertain tax positions.