More than a year after the Food and Drug Administration sent XenoPort and its partner GlaxoSmithKline
The agency was worried about the risk-benefit ratio of the drug given that it was known to cause pancreatic cancer in rats. It seems the duo was able to convince the agency that it wasn't that big of a deal.
Horizant will see some but not a lot of competition for patients with restless leg syndrome, a disease where patients have an uncontrollable urge to move their legs to avoid an uncomfortable sensation. Glaxo sells Requip to treat the disorder and Boehringer Ingelheim's Mirapex is also approved for restless leg syndrome.
Horizant is a modified-release form of Pfizer's
Shares of XenoPort are up a whopping 65% today. While getting a first drug approved is always reason for celebration, investors should be very careful here. The euphoric party often causes valuations that don't look as pretty during the ensuing hangover. Dendreon
XenoPort's investors may not be restless for an approval anymore, but now they have something else to keep them pacing.