WASHINGTON--The United States on Wednesday authorized Pfizer Inc's antiviral COVID-19 pill for people ages 12 and older at risk of severe illness, the first oral and at-home treatment as well as a new tool against the fast-spreading Omicron variant.
Pfizer's antiviral regimen, Paxlovid, was nearly 90% effective in preventing hospitalizations and deaths in patients at high risk of severe illness, according to data from the company's clinical trial. Recent lab data suggests the drug retains its effectiveness against Omicron, Pfizer said.
Pfizer raised its 2022 production projections to 120 million courses of treatment from 80 million and said it was ready to start immediate delivery in the United States. The treatment's two-drug regimen includes a new medicine and a second older antiviral called ritonavir.
The U.S. government will have 265,000 treatment courses available by January and supply will ramp up in subsequent months, White House COVID-19 response coordinator Jeff Zients told a briefing. The government expects to receive the 10 million courses it has ordered within six months.
"Paxlovid's approval is a major milestone that marks another step towards making COVID-19 a much more manageable infection," said Amesh Adalja, a senior scholar at the Johns Hopkins Institute for Health Security.
"There are two key issues, however, that remain: It will be scarce in the coming weeks and its optimal use requires prompt diagnosis, which can be difficult with the continual testing problems that plague us," Adalja added.
Pfizer has said it has 180,000 treatment courses ready to ship this year. The U.S. government's contract for 10 million courses of the drug is priced at $530 per course.
The Food and Drug Administration's decision to issue emergency authorization for the treatment comes as the U.S. combats a surge in COVID-19 cases driven by the Omicron variant, with President Joe Biden announcing plans for more federal vaccination and testing sites. The pills can fill a treatment gap opened by the Omicron variant, said William Schaffner, a leading infectious disease expert from the Vanderbilt University School of Medicine. The most widely used monoclonal antibody treatments for COVID-19 have proven to be less effective at fighting the variant and there is limited supply of the one remaining treatment that works, he said. Monoclonal antibodies are typically given intravenously in hospitals, are not widely available and are more than twice the cost of the Pfizer pill.
