prophylactically

American  

[proh-fuh-lak-tik-lee, prof-uh-] / ˌproʊ fəˈlæk tɪk li, ˌprɒf ə- /

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.

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Etymology

Origin of prophylactically

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

Example Sentences

Both antivirals can also be prescribed if you’ve been exposed to the flu and want to take it prophylactically.

From The Wall Street Journal • Jan. 12, 2026

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.

From Los Angeles Times • May 10, 2024

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

From Science Daily • Mar. 12, 2024

“You could get unions prophylactically adopting less effective tactics — things like giving advance warning about strike, which gives the employer a lot more time to hire replacement workers,” she said.

From New York Times • Jun. 1, 2023

Even in the rice puddings Tessie made, covering each little bowl with wax paper before putting it away in the fridge— even into these prophylactically secure desserts my hair found its way!

From "Middlesex: A Novel" by Jeffrey Eugenides