Photo used for illustrative purpose.

The United States on Wednesday authorised Pfizer Inc's antiviral COVID-19 pill for at-risk people aged 12 and above, making it the first oral treatment and which can be taken at home, providing a potentially important tool in the fight against the fast-spreading Omicron variant.

Pfizer's antiviral regimen, Paxlovid, was nearly 90% effective in preventing hospitalisations 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.
"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 US 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 authorisation 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.

Reuters