Ciprofloxacin
Ciprofloxacin is a fluoroquinolone antibiotic used for selected bacterial infections. Because systemic fluoroquinolones can cause serious and sometimes disabling adverse effects, ciprofloxacin should be used only when the expected benefit justifies the risk for the specific infection.
At a glance
Quick facts
- Drug class
- Fluoroquinolone antibiotic
- Main use
- Selected bacterial infections
- Routes
- Oral · IV; topical products exist
- WHO ATC
- J01MA02
- Key safety
- Serious fluoroquinolone warnings
- Stewardship
- Use only for appropriate bacterial indications
Names & terminology
How this entity may be named or searched
- Canonical generic name
- Ciprofloxacin
- Salt name
- Ciprofloxacin hydrochloride appears in product labeling
- Brand example
- Cipro
- Formulation context
- Immediate-release, suspension and extended-release products have different instructions.
Structured drug profile
Drug profile
What is ciprofloxacin?
Ciprofloxacin is a fluoroquinolone antibiotic used for selected bacterial infections. It does not treat viral infections such as colds or influenza.
What is ciprofloxacin used for?
Ciprofloxacin treats or prevents selected infections caused by susceptible bacteria. It does not treat viral infections such as colds or influenza, and unnecessary antibiotic use contributes to antimicrobial resistance. [1]
How ciprofloxacin works
Ciprofloxacin inhibits bacterial enzymes needed for DNA replication, which stops susceptible bacteria from multiplying and surviving.
Forms and formulations
Systemic ciprofloxacin includes oral tablets, suspension and intravenous formulations. Eye and ear products also exist, but their dosing is not interchangeable with systemic products.
Country / market layer
Brands & formulations by country
Selected registered products and formulations differ by market. African tabs use national regulatory records or regulator-backed public registration data.
How ciprofloxacin is taken
Oral products include tablets, suspension and extended-release formulations. Instructions differ by formulation and infection. Ciprofloxacin should not be taken together with certain antacids, mineral supplements or products containing calcium, magnesium, aluminum, iron or zinc without spacing the doses as directed, because absorption can be reduced. [1]
Side effects
Common adverse effects can include nausea, diarrhea, headache or dizziness. Serious effects can include tendon inflammation or rupture, peripheral neuropathy, central nervous system effects and severe allergic reactions. Medical advice should be sought promptly for serious or unusual symptoms. [1] [2]
Major fluoroquinolone warnings
Systemic fluoroquinolones, including ciprofloxacin, are associated with serious adverse effects involving tendons, muscles, joints, peripheral nerves and the central nervous system. FDA has advised restricting their use for certain uncomplicated infections when other treatment options are available. [1] [2]
Interactions
Antacids and products containing calcium, magnesium, aluminium, iron or zinc can reduce oral absorption if taken too close to ciprofloxacin. Several medicines can also alter rhythm or other safety risks; check the exact label.
Pregnancy & breastfeeding
Pregnancy and breastfeeding decisions should be individualized because infection severity, alternatives and product labeling matter. A prescriber should review the clinical context.
Overdose and accidental extra doses
Suspected overdose requires urgent poison-centre or medical advice. Management depends on the amount, formulation, symptoms and kidney function.
Antibiotic stewardship
Ciprofloxacin should be used for bacterial infections where it is appropriate, not for viral illnesses. The choice of antibiotic depends on infection site, local resistance patterns, microbiology results, patient factors and safer alternatives. [1]
Common questions
Frequently asked questions
No. It is a fluoroquinolone antibiotic.
No. It does not treat viral infections.
Systemic fluoroquinolones can cause serious tendon, nerve, muscle, joint and central nervous system adverse effects.
Some antacids and mineral products reduce absorption and need to be separated from ciprofloxacin according to the product instructions.
Not unless a clinician tells you to stop or a serious adverse effect occurs; follow the prescribed course and safety instructions.
Sources
Clinical statements in this reference are linked to named public-health, regulatory or guideline sources.
- 1. MedlinePlus. Ciprofloxacin Drug Information, revised August 2026. Source ↗
- 2. FDA. Fluoroquinolone Drug Safety Communication on disabling side effects. Source ↗
This medicine reference is based on trusted medical and regulatory sources and is awaiting clinician review. It is not a substitute for personalized medical advice.