Impax Labs confirms patent challenge to Pfizer/UCB's Toviaz

4 July 2013

US specialty drugmaker Impax Laboratories (Nasdaq: IPXL) yesterday confirmed that it has initiated a challenge of the patents listed in the Orange Book in connection with Toviaz (fesoterodine fumarate extended-release tablets, 4mg and 8mg), an overactive bladder drug marketed by pharma behemoth Pfizer (NYSE: PFE) under a licensing agreement with Belgium’s UCB (UCB: BR).

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