Medivation’s (MDVN-$57.57) senior management remains upbeat on growth prospects for the
prostate cancer drug Xtandi. In fact, chief executive officer David Hung
boasted to analysts on the second-quarter earnings call that Xtandi is “quickly
becoming the leading therapy in the post-docetaxel market.”
However, Xtandi’s
clinical advantages versus Johnson & Johnson’s (JNJ) competitor Zytiga –
dosing without regard to timing of meals or concomitant steroid use and monthly
monitoring, such as liver function testing – haven’t proven attractive enough
to change physician prescribing habits. In fact, market data available through
April continued to show Zytiga held a 57% share of the chemo-refractory mCRPC
market, compared with Xtandi’s roughly 30% share.
Although physician
enthusiasm for Xtandi remains high in the post-chemo setting mCRPC, a
confluence of issues could prove problematic to Xtandi gaining any material
ground against Zytiga. In particular, post-launch experience is showing that
Zytiga’s approved labeling to be used in a broader clinical spectrum of
prostate cancer and Xtandi’s aggressive cost (average wholesale price of $7,450
for a 30-day supply is roughly 28% more expensive than Zytiga) may hinder
Xtandi’s reimbursement and uptake -- especially in economically-depressed
countries in the EU, like France, Greece and Spain
Editor David J
Phillips does not hold a financial interest in any stocks mentioned in this
article. The 10Q Detective has a Full Disclosure Policy.
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