Exhibit 12



Wyeth

Computation of Ratio of
Earnings to Fixed Charges

(In thousands except ratio amounts)



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



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