Pfizer nixes more study of twice-daily obesity pill treatment that made many patients nauseous

Pfizer shares sank Friday when the drugmaker said it would abandon a twice-daily obesity treatment after more than half the patients in a clinical trial stopped taking it. The pharmaceutical company said it will focus instead on a once-daily version of the pill, danuglipron, instead of starting a late-stage study of the other version. Late-stage studies are usually the last and most expensive trials a drugmaker undertakes before seeking regulatory approval.