BridgeBio Pharma Inc. gained US approval for a drug to treat a progressive and deadly form of heart disease, paving the way for the biotech company to go head-to-head with Pfizer Inc. in an increasingly competitive market.

BridgeBio secured approval for Attruby Friday, along with the all-important mortality benefit that could give the drug a significant boost in the market against Pfizer’s tafamidis and potentially Alnylam’s Amvuttra.

The U.S. Food and Drug Administration has approved BridgeBio's drug for a rare and deadly heart condition, the company said on Friday, making it the first new treatment in a market dominated by Pfizer's blockbuster Vyndaqel.