COVID-19: The US FDA has issued a warning to healthcare professionals that Evusheld is not effective against the new variants

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FDA added important information to the authorized Fact Sheets for Evusheld (tixagevimab co-packaged with cilgavimab) to inform health care providers and individuals receiving Evusheld of the increased risk for developing COVID-19 when exposed to variants of SARS-CoV-2 that are not neutralized by Evusheld.

Detailed neutralization data can be found in the revised authorized Fact Sheet for Healthcare Providers.

 Health care professionals should inform patients of this risk and advise patients who develop signs or symptoms of COVID-19 to test for SARS-CoV-2 infection and promptly seek medical attention, including starting treatment for COVID-19, as appropriate if they test positive.   

Evusheld is currently the only option for pre-exposure prophylaxis (PrEP) of COVID-19 and is authorized under Emergency Use Authorization (EUA) for use in immunocompromised individuals who may not mount an adequate response to COVID-19 vaccination, and for individuals for whom COVID-19 vaccination is not recommended due to a history of a severe adverse reaction.

It is authorized to be administered every six months. Use of Evusheld is not a substitute for COVID-19 vaccination, and individuals for whom COVID-19 vaccination is recommended should get vaccinated. 

Individuals who received Evusheld but who develop COVID-19 remain eligible for use of any of the available treatments for COVID-19 if the criteria for use are met.  

FDA continues to recommend Evusheld as an appropriate option for PrEP to prevent COVID-19, in combination with other preventative measures like getting vaccinated and boosted as recommended, as Evusheld still offers protection against many of the currently circulating variants and may offer protection against future variants.  

What Patients Should Know: 

  • Talk with your health care provider about appropriate treatment options in case you develop COVID-19. There are several approved and authorized treatments for COVID-19 that are expected to retain activity against currently circulating SARS-CoV-2 variants. 
  • If you develop COVID-19 symptoms, tell your health care provider and test right away.
    It’s not possible to know which variant of SARS-CoV-2 you may have contracted. Timely treatment can reduce your risk of developing severe disease, including decreasing your risk of hospitalization or death. 
  • If recommended by your health care provider, get vaccinated or boosted with a bivalent booster dose to help your body increase your protection against SARS-CoV-2 infection. Follow CDC’s guidelines on additional prevention strategies to protect yourself from getting sick. 

What Health Care Providers Should Know: 


FDA authorizes revisions to Evusheld dosing

Update [6/29/2022] There are different variants (and subvariants) of SARS-CoV-2, and FDA continues to evaluate how well Evusheld (tixagevimab co-packaged with cilgavimab) neutralizes them. Currently, the Omicron BA.2, BA.2.12.1, BA.4, and BA.5 subvariants are circulating in the United States.

Nonclinical data and pharmacokinetic modeling suggest that activity against these subvariants may be retained for six months at drug concentrations achieved following an Evusheld dose of 300 mg of tixagevimab and 300 mg cilgavimab.

Therefore, on June 29, 2022, FDA revised the Evusheld Fact Sheet for Healthcare Providers to recommend repeat dosing every six months with a dose of 300 mg of tixagevimab and 300 mg cilgavimab if patients need ongoing protection. The previous Fact Sheet for Healthcare Providers did not provide a specific recommendation on the dosing interval.

We continue to monitor the neutralizing activity of Evusheld against emerging SARS-CoV-2 variants and will provide additional updates as needed.

For further details please refer to the Frequently Asked Questions for Evusheld.

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