Scientists and federal agencies say they are investigating reports of Americans who say they faced a resurgence of COVID-19 soon after finishing off a course of Paxlovid, Pfizer's antiviral treatment for the disease.
of Paxlovid, the company's executives pointed out, regardless of whether they got the drug or a placebo.
"In other words, the within-5-day symptom clock starts over with the relapse. This would be justified clinically for our highest-risk patients , and favored over other outpatient treatments until we know more," Sax wrote on Wednesday. While Pfizer and the FDA say they have not spotted any signs of resistance to Paxlovid in rebound cases so far,In addition, many patients taking Paxlovid must put off taking other needed medications that can"We have no data to support that a second course really is a benefit. Anecdotally, most people simply get better. We have a lot of theoretical reasons why maybe that second course isn't needed," says Dr.
Speaking on Friday, Dr. John Farley, the FDA's top official overseeing drugs, underscored that Paxlovid was authorized with the aim of reducing the risk of severe disease, not necessarily"on the basis of symptom improvement."
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