doxy·​cy·​cline | \ ˌdäk-sə-ˈsī-ˌklēn How to pronounce doxycycline (audio) \

Definition of doxycycline

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

Examples of doxycycline in a Sentence

Recent Examples on the Web Another big difference between murine typhus and COVID-19 is that murine typhus is completely treatable with antibiotics, such as doxycycline. Claire Gillespie,, "Doctors Thought a California Man Had COVID-19, but It Was Actually Murine Typhus—Here's What to Know," 6 Nov. 2020 The standard treatment for brucellosis is antibiotics—usually a combination of doxycycline and streptomycin taken over a period of about six weeks, says NORD. Claire Gillespie,, "A Brucellosis Outbreak in China Has Been Linked to a Factory Leak—Here's What You Need to Know," 18 Sep. 2020 There are dozens of studies ongoing with hydroxychloroquine, more than for any other potential Covid-19 treatment, including studies that combine it with antibiotics such as azithromycin or doxycycline. Matthew Herper, STAT, "Study: Hydroxychloroquine had no benefit for hospitalized Covid-19 patients, possibly closing door to use of drug," 5 June 2020 State attorneys general originally filed a civil lawsuit in 2016 against six companies, accusing them of conspiring to manipulate prices for doxycycline hyclate, an antibiotic, and glyburide, used in the treatment of diabetes. WSJ, "Novartis Unit to Pay $195 Million in Generic-Drug Price-Fixing Case," 3 Mar. 2020 At particular risk of running short is the U.S. supply of antibiotics such as amoxicillin, doxycycline, penicillin and other key drugs, with experts noting that 90% of their core components are sourced in China. Megan Cerullo, CBS News, "How coronavirus in China could cause drug shortages in America," 25 Feb. 2020 According to the Mayo Clinic, oral antibiotics are the standard treatment for early-stage Lyme disease and include doxycycline, amoxicillin or cefuroxime, depending on age and health condition. Adrianna Rodriguez, USA TODAY, "Justin Bieber’s Lyme disease diagnosis: What are symptoms, treatments?," 9 Jan. 2020 While there isn’t a definitive treatment regimen for this condition, the antibiotic doxycycline has been shown to help patients who have it, the CDC says. Patia Braithwaite, SELF, "8 Tick-Borne Illnesses That Aren’t Lyme Disease," 26 July 2019 Some antibiotics, such as minocycline and doxycycline, can treat prurigo pigmentosa. Samantha Lauriello,, "Keto Rash Is the Latest Side Effect of the Low-Carb Diet—Here's How to Treat It," 29 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'doxycycline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of doxycycline

1966, in the meaning defined above

History and Etymology for doxycycline

deoxy- + tetracycline

Keep scrolling for more

Learn More about doxycycline

Time Traveler for doxycycline

Time Traveler

The first known use of doxycycline was in 1966

See more words from the same year

Statistics for doxycycline

Cite this Entry

“Doxycycline.” Dictionary, Merriam-Webster, Accessed 1 Mar. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Keep scrolling for more

More Definitions for doxycycline


doxy·​cy·​cline | \ ˌdäk-sə-ˈsī-ˌklēn How to pronounce doxycycline (audio) \

Medical Definition of doxycycline

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

Comments on doxycycline

What made you want to look up doxycycline? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

February 2021 Words of the Day Quiz

  • squirrel in winter
  • Which is a synonym of perdure?
Spell It

Can you spell these 10 commonly misspelled words?


Anagram puzzles meet word search.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!