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Detailed medicine guidance

About ciprofloxacin

NHS medicines information on ciprofloxacin – what it's used for and key facts.

About this information

This NHS content is written for people in England. Medicine names, availability, prescribing and services may differ in other countries.

Ciprofloxacin is an antibiotic. It belongs to a group of antibiotics called fluoroquinolones. It works by killing the bacteria that causes an infection.

Ciprofloxacin is a broad-spectrum antibiotic which means that it's used to treat a number of bacterial infections, such as:

It is also used to help prevent people getting meningitis if they have been in close contact with someone with the infection.

Ciprofloxacin is only available on prescription.

It comes as tablets, a liquid that you drink, ear drops and eye drops. It's also given by injection, but this is usually done in hospital.

Ciprofloxacin ear drops also come mixed with other medicines, such as fluocinolone, known as Cetraxal Plus, or dexamethasone.

Ciprofloxacin tablets and liquid are only used when no other antibiotics are suitable, because there's a risk of serious and long-term side effects.

View the original NHS website page ↗. Refreshed 19 August 2026.

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