Exhibit 12

Wyeth

Computation of Ratio of Earnings to Fixed Charges

(In thousands except ratio amounts)

	Nine Months Ended September 30, 2008		Year Ended December 31,
			2007		2006			2005			2004			2003
Earnings (Loss):
Income (loss) from continuing operations before income taxes	$	5,084,641	$	6,456,682	$	5,429,904		$	4,780,589		$	(129,847	)	$	2,361,612
Add:
Fixed charges		477,343		754,290		625,513			461,431			360,805			346,564
Minority interests		14,678		23,277		29,769			26,492			27,867			32,352
Amortization of capitalized interest		24,200		24,240		22,465			21,356			9,350			8,772
Less:
Equity income (loss)		582		130		(317	)		(104	)		(524	)		(468	)
Capitalized interest		52,100		79,600		71,400			46,450			86,750			115,800
Total earnings as defined	$	5,548,180	$	7,178,759	$	6,036,568		$	5,243,522		$	181,949		$	2,633,968
Fixed Charges:
Interest and amortization of debt expense	$	381,963	$	616,983	$	498,847		$	356,834		$	221,598		$	182,503
Capitalized interest		52,100		79,600		71,400			46,450			86,750			115,800
Interest factor of rental expense(1)		43,280		57,707		55,266			58,147			52,457			48,261
Total fixed charges as defined	$	477,343	$	754,290	$	625,513		$	461,431		$	360,805		$	346,564
Ratio of earnings to fixed charges		11.6		9.5		9.7			11.4			0.5			7.6

⁽¹⁾ A 1/3 factor was used to compute the portion of rental expenses deemed representative of the interest factor.