Pfizer ends $3B drug dream despite phase 2b success, leaving Regeneron with a clear run at cardiovascular market

A big chunk of Pfizer’s plan to add $15 billion to sales just went up in smoke. Having gone over phase 2b data on cardiovascular drug vupanorsen, Pfizer has decided to return the rights to Ionis Pharmaceuticals, leaving it without a candidate it tipped to deliver peak sales of more than $3 billion.