Stanford Study Reveals Pfizer's Paxlovid Ineffective for Long Covid Symptoms

Stanford Study Reveals Pfizer's Paxlovid Ineffective for Long Covid Symptoms

Elara Mendoza
1 min read

Stanford Study Discovers Pfizer's Paxlovid Ineffective for Long Covid Symptoms

A recent study conducted by Stanford University researchers found that Pfizer Inc.'s antiviral drug, Paxlovid, administered over a 15-day course, did not provide significant relief for individuals experiencing long Covid symptoms. The trial, which involved 102 patients receiving the drug twice daily and 53 on a placebo, showed no substantial difference in the severity of six core symptoms at both 10 and 15 weeks after treatment. This outcome indicates that Paxlovid may not effectively manage the lingering effects of Covid-19, potentially impacting treatment strategies for long Covid sufferers.

Key Takeaways

  • The Stanford study revealed that Pfizer's Paxlovid did not offer significant relief for long Covid patients.
  • The trial included 102 patients on Paxlovid and 53 receiving a placebo.
  • No noticeable disparity in symptom severity was observed at 10 and 15 weeks post-treatment.
  • Paxlovid was administered twice daily for a 15-day duration.
  • Study results suggest limited efficacy of Paxlovid for long Covid symptoms.


The study's findings on Paxlovid's ineffectiveness for long Covid symptoms may lead healthcare providers to reconsider treatment protocols. This could potentially impact Pfizer's market position and revenue, leading to short-term volatility for investors. The uncertainty surrounding the drug's broader applications may prompt increased research into alternative treatments for long Covid, potentially benefiting other pharmaceutical companies and fostering innovation in antiviral therapies. The study underscores the complexity of long Covid, emphasizing the need for diverse therapeutic approaches.

Did You Know?

  • Long Covid: Refers to the persistent or new symptoms that occur four or more weeks after the initial COVID-19 infection, such as fatigue, shortness of breath, cognitive dysfunction, and other symptoms that affect daily functioning.
  • Paxlovid: An antiviral medication developed by Pfizer Inc. for the treatment of COVID-19, consisting of two drugs, nirmatrelvir and ritonavir, designed to be taken orally to block the replication of SARS-CoV-2, the virus that causes COVID-19.
  • Placebo: In clinical trials, a placebo is an inactive substance given similarly to an active drug or treatment being tested, allowing the effects of the active drug to be compared for effectiveness.

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