How does doxycycline work?

Doxycycline works by killing the bacteria that cause sinusitis, pneumonia, bronchitis, chlamydia and other infections.

Doxycycline prevents the bacterial cell from carrying out essential functions that are necessary for life (i.e. making the protein building blocks that make up the bacterial cell), which stops the bacteria from multiplying.

Find out more about which infections doxycycline is used for, who can take it, and the side effects and interactions of doxycycline.

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  • Antibiotic Expert Group. Therapeutic Guidelines: Antibiotic version 14; Doxycycline. Melbourne: Therapeutic Guidelines Limited, 2012 (accessed 24 February 2012).