Cipro vs Macrobid for a urinary tract infection: compared
Macrobid (nitrofurantoin) is a first-line treatment for uncomplicated bladder infections. Cipro (ciprofloxacin) is stronger and also treats kidney infections, but because of serious side effects the FDA advises reserving it for bladder infections when other options are not suitable.
Updated October 4, 2026
At a glance
- Bladder infection
- Cipro
- Reserved for when other options are unsuitable
- Macrobid
- A first-line choice
- Kidney infection
- Cipro
- Yes
- Macrobid
- No; it does not reach the kidneys well
- Usual course for a bladder infection
- Cipro
- About 3 days
- Macrobid
- About 5 days
- Main cautions
- Cipro
- Tendon damage, nerve damage, mood changes, blood sugar swings
- Macrobid
- Not used with poor kidney function; rare lung and liver reactions
- Generic
- Cipro
- Yes
- Macrobid
- Yes
Cipro ciprofloxacin, a fluoroquinolone | Macrobid nitrofurantoin | |
|---|---|---|
| Bladder infection | Reserved for when other options are unsuitable | A first-line choice |
| Kidney infection | Yes | No; it does not reach the kidneys well |
| Usual course for a bladder infection | About 3 days | About 5 days |
| Main cautions | Tendon damage, nerve damage, mood changes, blood sugar swings | Not used with poor kidney function; rare lung and liver reactions |
| Generic | Yes | Yes |
Why Macrobid usually comes first
Nitrofurantoin concentrates in the urine, works against most bacteria that cause bladder infections, and has kept its effectiveness because it is used only for this. Ciprofloxacin is a powerful broad antibiotic, and in 2016 the FDA advised that fluoroquinolones such as Cipro be reserved for uncomplicated bladder infections only when no other option is suitable, because their side effects can be disabling.
When Cipro is the right choice
Nitrofurantoin does not reach the kidneys, so it does not treat a kidney infection, signaled by fever, flank pain, nausea or feeling very unwell. Ciprofloxacin and some other antibiotics do. Nitrofurantoin is also avoided when kidney function is significantly reduced.
Side effects to know
Stop Cipro and seek advice at the first sign of tendon pain or swelling, numbness or tingling, or mood changes, and take it apart from antacids, calcium and iron. Nitrofurantoin can turn urine brown, which is harmless; stop it and seek advice for cough, chest pain or breathlessness. Both are taken for the full course.
Cost
Both are inexpensive generics. A urine culture can show which antibiotic will work if the infection does not clear.
Preventing repeat infections
Drinking enough fluids and urinating after sex are commonly advised to lower the chance of another bladder infection. If infections keep returning, ask about testing and prevention options rather than repeating the same antibiotic each time.
Questions for your prescriber
- Could this be a kidney infection rather than a bladder infection?
- Is my kidney function fine for nitrofurantoin?
- Should a urine culture be sent?
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Sources
- DailyMed, ciprofloxacin prescribing information
- DailyMed, nitrofurantoin prescribing information
- FDA, Drug Safety Communications (fluoroquinolone safety)
Written by the Script Unlock editorial team from the sources above. It is general information, not advice for you or your pet; your prescriber decides which medicine is right.
Script Unlock is a marketplace that lets licensed pharmacies quote a cash price on your prescription. It does not prescribe, dispense or sell medication, does not process patient payments, and does not give medical advice. Always follow the instructions of your prescriber and pharmacist and read the medication guide supplied with your medicine.