NDA acceptance triggers $23M fee to XenoPort

23 March 2009

US drug developer XenoPort says that the Food and Drug Administration has accepted for review the New Drug Application filed by its partner  GlaxoSmithKline for Solzira (gabapentin enacarbil) extended-release  tablets for moderate-to-severe primary restless legs syndrome.

In accordance with XenoPort's collaboration agreements with GSK and its  other partner, Japanese drug major Astellas, the FDA's acceptance of  the NDA triggers milestone payments to XenoPort of $23.0 million in the  aggregate.

Last year, the companies withdrew the NDA after the agency requested  that the data in a single study be reformatted (Marketletter November  17, 2008).

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