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First Pill to Prevent COVID-19 After Exposure Approved by FDA

The five-day regimen cut symptomatic COVID-19 risk by 67% in trials, according to Shionogi.

  • The FDA approved XOCOVA on Monday, the first oral medication for COVID-19 post-exposure prophylaxis, according to manufacturer Shionogi. The five-day pill regimen is approved for people aged 12 and older.
  • According to Shionogi, the oral antiviral works by blocking viral replication before symptoms develop. Patients take three tablets on the first day, followed by one tablet daily for the next four days.
  • In the phase 3 SCORPIO-PEP trial, Ensitrelvir reduced the risk of developing symptomatic COVID-19 by 67% compared to placebo. Treatment participants showed 2.9% infection rates versus 9% in the placebo group.
  • This approval arrives during a precarious time for COVID-19 prevention amid federal scrutiny of vaccines. As of May 9, only 18% of adults in the United States had received an updated vaccine for the 2025-2026 season, according to the CDC.
  • Ensitrelvir was already approved for COVID-19 PEP in Japan, where the medication has been allowed as a treatment since 2022. However, it is not approved for that specific indication in the United States.
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It is expected that the edible COVID-19 treatment “jokoba (ingredient name: encitrelvir)”, which was jointly developed by Ildong Pharmaceutical with Japan's Shionogi Pharmaceutical, will speed up the domestic licensing rechallenge as it is approved by the U.S. Food and Drug Administration (FDA). However, since there are treatments already distributed in the domestic market and demand for COVID-19 treatments itself has decreased significantly com…

abc10 Sacramentoabc10 Sacramento
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First pill to prevent COVID-19 after exposure approved by FDA

The FDA has approved the first and only pill to prevent COVID-19 after exposure to the virus. Here's how it works. (Photo: Business Wire)

·Sacramento, United States
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Business Wire broke the news in Crystal River, United States on Sunday, May 31, 2026.
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