Ciprofloxacin
InfectionsAlso known as Cipro
Ciprofloxacin is a fluoroquinolone antibiotic used for certain urinary, prostate, bone, and gut infections when gentler options won't do the job. It carries an FDA boxed warning — the strongest kind — because it can rarely damage tendons, nerves, and mood, sometimes permanently. That's why doctors save it for infections that really need it. If your doctor prescribed it, they've judged the infection is worth it — just know the warning signs below.
How to take it
When
Space doses evenly and drink plenty of water, exactly as prescribed.
Food
Keep dairy, calcium, iron, and antacids a couple of hours away from each dose — they block the drug from absorbing.
Avoid
Extra sun sensitivity — cover up and use sunscreen. Skip heavy exercise if anything in a tendon feels off.
Big warning
Tendon pain or swelling — especially at the back of the ankle — means stop the drug and call your doctor immediately.
Missed a dose?
Take it as soon as you remember. If it's almost time for your next dose, skip the missed one and continue on schedule. Never double up.
Common side effects
- Nausea or upset stomach
- Diarrhea
- Headache or dizziness
- Trouble sleeping
- Sunburn more easily
Call a doctor if
- Sudden tendon pain, swelling, or a snap — especially at the Achilles (back of the ankle). Stop the drug and call your doctor immediately; tendons can rupture.
- Tingling, burning, numbness, or weakness in your hands or feet — possible nerve damage. Stop and call your doctor right away.
- New confusion, anxiety, depression, hallucinations, or thoughts of self-harm — call your doctor now; get emergency help if you're in danger.
- Trouble breathing, swelling of the face or throat, or hives — serious allergic reaction. Get emergency help now.
- Severe watery or bloody diarrhea, during treatment or even weeks after — possible C. diff gut infection. Call your doctor; don't just take anti-diarrhea medicine.