doxycycline

noun

doxy·​cy·​cline ˌdäk-sə-ˈsī-ˌklēn 

: a broad-spectrum tetracycline antibiotic C₂₂H₂₄N₂O₈ used orally to treat various bacterial infections

Examples of doxycycline in a Sentence

Recent Examples on the Web

John has since completed rounds of doxycycline and is recovering. — Jennifer McLogan, CBS News, 31 July 2026

Taking magnesium with certain antibiotics, such as doxycycline and ciprofloxacin, can reduce antibiotic absorption. — Kirstyn Hill, Health, 14 July 2026

But a dose of doxycycline or amoxicillin can generally cure it. — Burkhard Bilger, New Yorker, 29 June 2026

Rocky Mountain Spotted Fever is a serious, often fatal illness requiring urgent doxycycline treatment. — Omer Awan, Forbes.com, 23 June 2026

Word History

Etymology

deoxy- + tetracycline

First Known Use

1966, in the meaning defined above

Rhymes for doxycycline

• minocycline

Medical Definition

doxycycline

noun

doxy·​cy·​cline ˌdäk-sə-ˈsī-ˌklēn 

: a broad-spectrum tetracycline antibiotic C₂₂H₂₄N₂O₈ used orally to treat various bacterial infections