doxycycline

American  

[dok-see-sahy-kleen, -klin] / ˌdɒk siˈsaɪ klin, -klɪn /

noun

Pharmacology.

1. a synthetic analog of a broad-spectrum antibiotic tetracycline drug, C 22 H 24 N 2 O 8 , used against a wide range of susceptible Gram-positive and Gram-negative organisms.

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doxycycline British  

/ ˌdɒksɪˈsaɪklɪn /

noun

1. a tetracycline antibiotic used to treat conditions caused by a wide range of bacteria, including anthrax

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Etymology

Origin of doxycycline

Contraction of deoxytetracycline

Example Sentences

Those treated with doxycycline showed a 30-35 percent lower risk of later developing schizophrenia compared with peers who received other types of antibiotics.

From Science Daily • Nov. 6, 2025

One of the first things they did as husband and wife was to take doxycycline pills from their local health centre.

From BBC • Jul. 23, 2025

Studies have demonstrated doxycycline works in that group, but there’s not sufficient evidence to make the same recommendation for other people, agency officials said.

From Seattle Times • Jun. 4, 2024

That data also confirmed the model's predictions that the absorption of doxycycline is affected by digoxin, levetiracetam, and tacrolimus.

From Science Daily • Feb. 20, 2024

The treatment is considered very effective at preventing chlamydia and syphilis, but may be less effective against gonorrhea; protection against gonorrhea may vary because some strains are resistant to doxycycline, Stewart said.

From Seattle Times • Oct. 14, 2023