13 Things To Know About Paxlovid, the Latest COVID-19 Pill - Yale Medicine

[Originally published: March 10, 2022. Updated: Jan. 10, 2024]

Note: Information in this article was accurate at the time of original publication. Because information about COVID-19 changes rapidly, we encourage you to visit the websites of the Centers for Disease Control & Prevention (CDC), World Health Organization (WHO), and your state and local government for the latest information.

Paxlovid, the pill that has become the go-to treatment for COVID-19 treatment, was granted full approval in May by the Food and Drug Administration (FDA) for the treatment of mild-to-moderate COVID-19 in adults at high risk for severe disease, including hospitalization and death. The drug also remains available to everyone 12 and older (weighing at least 88 pounds) who has mild-to-moderate disease and is at high risk for severe disease under an FDA Emergency Use Authorization.

Paxlovid is an oral antiviral pill that can be taken at home to help keep high-risk patients from getting so sick that they need to be hospitalized. So, if you are eligible to take the pills, you can take them at home and lower your risk of going to the hospital.

The drug, developed by Pfizer, had an 89% reduction in the risk of hospitalization and death in unvaccinated people in the clinical trial that supported the EUA, a number that was high enough to prompt the National Institutes of Health (NIH) to prioritize it over other COVID-19 treatments. Studies outside of the laboratory have since confirmed Paxlovid's effectiveness among people who have been vaccinated. It's cheaper than many other COVID-19 drugs (at this time, U.S. residents eligible for Paxlovid will continue to receive the medicine at no charge), and it is expected to work against the latest Omicron subvariants.

"It's really our first efficacious oral antiviral pill for this virus," says Scott Roberts, MD, a Yale Medicine infectious diseases specialist. "It shows clear benefit, and it really can prevent hospitalization and death in people who are at high risk."

FDA approval will allow Paxlovid to remain available for adults indefinitely. Meanwhile, Pfizer continues to gather pediatric data to submit for FDA approval in children at a future date.

As far as convenience, this medication is considered an improvement over treatments like remdesivir (approved by the FDA in October 2020), which is administered by intravenous (IV) injection. The FDA also granted an EUA in December to a pill from Merck called molnupiravir (Lagevrio), but some studies suggest that molnupiravir has only a 30% reduction in the risk for hospitalization and death from COVID-19.

We asked Yale Medicine infectious diseases experts common questions about Paxlovid. Below are their responses.

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