Exhibit 12

Wyeth

Computation of Ratio of Earnings to Fixed Charges

(In thousands except ratio amounts)

	Three Months Ended March 31, 2009		Year Ended December 31,
			2008		2007		2006			2005			2004
Earnings (Loss):
Income (loss) from continuing operations before income taxes	$	1,688,452	$	6,338,087	$	6,456,682	$	5,429,904		$	4,780,589		$	(129,847	)
Add:
Fixed charges		140,200		621,640		754,290		625,513			461,431			360,805
Minority interests		4,621		20,481		23,277		29,769			26,492			27,867
Amortization of capitalized interest		8,740		32,485		24,240		22,465			21,356			9,350
Less:
Equity income (loss)		152		649		130		(317	)		(104	)		(524	)
Capitalized interest		12,350		69,500		79,600		71,400			46,450			86,750
Total earnings as defined	$	1,829,511	$	6,942,544	$	7,178,759	$	6,036,568		$	5,243,522		$	181,949
Fixed Charges:
Interest and amortization of debt expense	$	112,887	$	492,290	$	616,983	$	498,847		$	356,834		$	221,598
Capitalized interest		12,350		69,500		79,600		71,400			46,450			86,750
Interest factor of rental expense(1)		14,963		59,850		57,707		55,266			58,147			52,457
Total fixed charges as defined	$	140,200	$	621,640	$	754,290	$	625,513		$	461,431		$	360,805
Ratio of earnings to fixed charges		13.0		11.2		9.5		9.7			11.4			0.5

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