Ciproxin%2520%2528ciprofloxacin%2529

# Ciproxin (ciprofloxacin) ## Overview Ciprofloxacin is a broad-spectrum fluoroquinolone antibiotic that inhibits bacterial DNA gyrase and topoisomerase IV. It is active against many Gram-negative bacteria (including *Pseudomonas aeruginosa*) and select Gram-positive organisms. ## Primary Indications * Urinary tract infections (UTIs), including complicated cases and pyelonephritis. * Respiratory tract infections (excluding *S. pneumoniae*). * Abdominal infections (in combination with metronidazole). * Prostatitis. * Bone and joint infections. * Post-exposure prophylaxis for inhalational anthrax. ## Adult Dosing * **Uncomplicated UTIs:** 250–500 mg orally every 12 hours for 3 days. * **Complicated UTIs/Pyelonephritis:** 500 mg orally or 400 mg IV every 12 hours for 7–14 days. * **Respiratory/Abdominal/Bone/Joint Infections:** 500–750 mg orally or 400 mg IV every 12 hours for 7–21 days depending on severity. * **Maximum Dose:** Generally 750 mg orally every 12 hours or 400 mg IV every 8 hours for severe or complicated infections. ## Pediatric Dosing Use is restricted due to potential for arthropathy. * **Complicated UTI/Pyelonephritis:** 10–20 mg/kg/dose orally every 12 hours (max 750 mg/dose) or 6–10 mg/kg/dose IV every 8–12 hours (max 400 mg/dose). * **Inhalational Anthrax:** 15 mg/kg orally every 12 hours (max 500 mg/dose) or 10 mg/kg IV every 12 hours (max 400 mg/dose). ## Dose Adjustments * **Renal Impairment:** Adjust for CrCl < 50 mL/min. If CrCl is 30–50 mL/min, use 250–500 mg q12h. If CrCl < 30 mL/min, use 250–500 mg q18–24h. * **Hepatic Impairment:** No specific adjustment required, but use with caution in severe disease. ## Contraindications * Known hypersensitivity to fluoroquinolones. * Concurrent administration with tizanidine. * History of myasthenia gravis (exacerbation risk). ## Adverse Effects * **Common:** Nausea, diarrhea, vomiting, dizziness. * **Serious:** Tendonitis/tendon rupture (risk higher in >60 years old, post-transplant, or steroid users), QT prolongation, peripheral neuropathy, *Clostridioides difficile*-associated diarrhea, and blood glucose disturbances. ## Key Drug Interactions * **Cationic Compounds:** Antacids, iron, calcium, magnesium, and sucralfate drastically reduce absorption; separate by 2 hours before or 6 hours after ciprofloxacin. * **CYP1A2 Inhibitors/Substrates:** Increases levels of theophylline, caffeine, and tizanidine. * **Warfarin:** May enhance anticoagulant effects; monitor INR closely. ## Monitoring * Renal function (CrCl). * Symptoms of tendon pain or rupture. * Signs of *C. difficile* (persistent, watery diarrhea). * ECG (in patients at high risk for QT prolongation). ## Clinical Pearls * **Avoid in "First-Line":** Due to the high risk of severe side effects, reserve for situations where no alternative treatment exists for uncomplicated infections (e.g., sinusitis, bronchitis). * **Hydration:** Always ensure adequate fluid intake to prevent crystalluria. * **Photosensitivity:** Advise patients to avoid excessive sunlight or UV light. * **Local Protocols:** Always check local antibiograms; resistance rates for *E. coli* are high in many regions. *** **Educational Disclaimer:** This information is for educational purposes only and does not constitute medical advice. Confirm all dosages, precautions, and contraindications by reviewing the official manufacturer's prescribing information or your local formulary.