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Pfizer, Sanofi End Exubera Pact

Pfizer will pay $1.3 billion to buy out Sanofi-Aventis' share of Exubera.


(PFE) - Get Pfizer Inc. Report

has agreed to pay $1.3 billion to


(SNY) - Get Sanofi Report

for the French company's share of their partnership in Exubera, the inhaled insulin now under review by U.S. and European regulators.

The agreement, announced by the companies Thursday night, isn't a surprise. Pfizer and Sanofi-Aventis have been fighting about their partnership for more than a year.

The deal doesn't affect the third member of the Exubera development team,

Nektar Therapeutics

(NKTR) - Get Nektar Therapeutics Report

. The San Carlos, Calif., company developed the dry, powdered form of insulin and the inhaler for Exubera.

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If approved, Exubera would be the first inhaled insulin. The Food and Drug Administration is expected to make its decision later this month. The makers of Exubera, as well as developers of competing inhaled-insulin products, say these drugs will improve convenience for diabetics who must inject insulin.

Exubera has undergone a lengthy review process. In September, an FDA advisory panel voted 7-2 in favor of Exubera. Although the agency isn't bound by its advisers' recommendations, it usually follows their suggestions. The FDA was supposed to act in late October, but it said it needed an extra 90 days for its review. A key issue is whether inhaled insulin causes lung problems after prolonged use.

Pfizer and Nektar are seeking approval for Exubera for both Type 1 and Type 2 diabetes. Type 1 diabetes is characterized by the body's inability to produce insulin, the protein hormone that helps the body convert sugar into fuel for the body's cells.

Without insulin, sugar builds up in the blood, leading to dangerous complications including heart disease, kidney failure, nerve damage, limb amputation or blindness.

In Type 2 diabetes, which is the most common form of the disease, the body doesn't produce enough insulin or doesn't effectively use it.

The Pfizer buyout of Sanofi-Aventis' interests includes the worldwide rights to Exubera, along with insulin-production facilities in Germany that had been jointly owned by the companies. The deal must be approved by German antitrust regulators. Pfizer expects to close the transaction during the first quarter.

Pfizer signed an Exubera agreement in 1998 with the former


. Six years later, Aventis merged with


. Pfizer said this transaction triggered a change of control provision in its original agreement, allowing it to buy out its partner. Initially, Sanofi-Aventis disputed the matter before agreeing to sell its stake.