prophylactically

[proh-fuh-lak-tik-lee, prof-uh-]

adverb

1. preventively or protectively, as against a disease or infection.

   You don't need to be given antibiotics prophylactically unless your symptoms meet certain criteria.

Word History and Origins

Origin of prophylactically¹

prophylactic ( def. ) + -ally ( def. )

Example Sentences

Authorized by the FDA for emergency use, it’s given prophylactically and can help recipients prevent COVID-19 if they are later exposed to an infected person.

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In many countries they are distributed without prescriptions and administered in factory farming: prophylactically to prevent infections and enhance performance.

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The investigational monoclonal antibody could potentially be used prophylactically to prevent or better control EBV infections in such cases, the investigators note.

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They are used prophylactically, with health care workers aware that their patients are vulnerable to infection due to poor conditions, and may be unable to finish a full course of antibiotics or receive follow-up care.

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"In fact, there are no reported cases of atovaquone resistance when the drug has been given prophylactically," she says.

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