Cifran

# Cifran ## Overview - **Classification**: Fluoroquinolone antibiotic - **Mechanism**: Inhibits bacterial DNA gyrase and topoisomerase IV, enzymes essential for bacterial DNA replication and repair. This leads to bactericidal activity. ## Primary Indications 1. **Urinary Tract Infections (UTIs)** - Complicated and uncomplicated UTIs, pyelonephritis. 2. **Respiratory Tract Infections** - Exacerbations of chronic bronchitis, community-acquired pneumonia. 3. **Skin and Soft Tissue Infections** - Various infections, including diabetic foot infections. 4. **Bone and Joint Infections** - Osteomyelitis, septic arthritis. 5. **Intra-abdominal Infections** - Complicated intra-abdominal infections (often with metronidazole). 6. **Infectious Diarrhea** - Caused by susceptible organisms. ## Adult Dosing ### Standard Dosing **Uncomplicated Urinary Tract Infection** - **Dose**: **250 mg** to **500 mg** - **Frequency**: Every 12 hours - **Route**: Oral - **Duration**: 3 to 7 days **Complicated Urinary Tract Infection / Pyelonephritis** - **Dose**: **500 mg** (oral) or **400 mg** (IV) - **Frequency**: Every 12 hours - **Route**: Oral or IV - **Duration**: 7 to 14 days **Infectious Diarrhea** - **Dose**: **500 mg** - **Frequency**: Every 12 hours - **Route**: Oral - **Duration**: 5 to 7 days **Bone and Joint Infections** - **Dose**: **500 mg** to **750 mg** (oral) or **400 mg** (IV) - **Frequency**: Every 12 hours - **Route**: Oral or IV - **Duration**: 4 to 6 weeks or longer ### Dose Adjustments - **Renal Impairment**: - **CrCl 30-50 mL/min**: Administer usual dose every 12 hours (oral) or 75% of IV dose every 12 hours. - **CrCl <30 mL/min**: Administer usual dose every 24 hours (oral) or 50% of IV dose every 12 hours. - **Hemodialysis/CAPD**: Administer dose after dialysis. - **Hepatic Impairment**: Generally no dose adjustment needed for mild-moderate impairment. Use with caution in severe impairment. - **Elderly Patients**: No specific dose adjustment for age alone, but adjust for renal function. Monitor for QT prolongation. ## Pediatric Dosing *Note: Ciprofloxacin use in children is generally reserved for complicated infections due to concerns for musculoskeletal adverse effects.* ### Neonates (0-28 days) - **Use**: Generally **not recommended** due to risk of arthropathy and limited safety data. - **Special Notes**: Consider only for life-threatening infections (e.g., anthrax) where benefits outweigh risks and no other options are suitable. ### Infants (1-12 months) - **Use**: Generally **not recommended** due to risk of arthropathy. - **Special Notes**: Consult infectious disease specialist. Use only for severe infections unresponsive to other agents. ### Children (1-12 years) **Complicated Urinary Tract Infections / Pyelonephritis** - **Dose**: **10-20 mg/kg** - **Frequency**: Every 12 hours - **Route**: Oral or IV - **Maximum**: **750 mg/dose** (oral); **400 mg/dose** (IV) - **Special Notes**: Use only when other antibiotics are ineffective or contraindicated. Monitor for musculoskeletal pain. **Cystic Fibrosis (Pulmonary Exacerbations)** - **Dose**: **20 mg/kg** - **Frequency**: Every 12 hours - **Route**: Oral or IV - **Maximum**: **750 mg/dose** (oral); **400 mg/dose** (IV) - **Special Notes**: Often used for *P. aeruginosa* infections. ### Adolescents (13-18 years) - **Dose**: Follow adult dosing guidelines. - **Frequency**: As per adult recommendations. - **Route**: Oral or IV - **Maximum**: Adult maximum doses (e.g., **750 mg** oral, **400 mg** IV per dose). ## Safety Information ### Contraindications - **Absolute**: Hypersensitivity to ciprofloxacin or other fluoroquinolones. - **Absolute**: Concomitant administration with **Tizanidine** (risk of significant hypotension and sedation). - **Relative**: History of myasthenia gravis (may exacerbate muscle weakness). - **Relative**: QTc prolongation, uncorrected hypokalemia/hypomagnesemia (increased arrhythmia risk). ### Common Adverse Effects - **Very Common (>10%)**: Nausea, diarrhea. - **Common (1-10%)**: Headache, dizziness, abdominal pain, vomiting, rash, dyspepsia, elevated liver enzymes. - **Serious but Rare**: Tendinitis/Tendon rupture (especially Achilles), peripheral neuropathy, QTc prolongation, *Clostridioides difficile*-associated diarrhea (CDAD), severe hypersensitivity reactions (anaphylaxis, SJS), dysglycemia (hypo/hyperglycemia), psychiatric effects (anxiety, depression, hallucinations). ### Key Drug Interactions - **Tizanidine**: **Contraindicated** (severe hypotension and sedation). - **Antacids (Mg, Al, Ca), Iron, Zinc, Sucralfate**: Reduced ciprofloxacin absorption. Administer ciprofloxacin 2 hours before or 6 hours after these agents. - **Warfarin**: May enhance anticoagulant effect. Monitor INR closely. - **Theophylline**: Increased theophylline levels and toxicity. Monitor levels. - **Oral Hypoglycemics/Insulin**: Risk of dysglycemia. Monitor blood glucose. - **QTc prolonging drugs**: Increased risk of Torsades de Pointes. Avoid co-administration if possible. ## Monitoring & Follow-up - **Before Treatment**: Culture & sensitivity (if appropriate), baseline renal function (CrCl). - **During Treatment**: - **Clinical Signs**: Resolution of infection symptoms, signs of adverse effects (e.g., tendon pain, neuropathy, rash). - **Renal function**: Periodically in prolonged treatment or with risk factors. - **Blood glucose**: In diabetic patients or those with risk factors for dysglycemia. - **INR**: For patients on warfarin. ## Clinical Pearls - 💡 **Tendon Rupture**: Counsel patients on risk of tendon pain/rupture. Discontinue at first sign of pain. Risk increased with steroids, elderly, transplant recipients. - 💡 **Administration**: Can be taken with or without food. Avoid dairy products and fortified juices *alone* as they can reduce absorption. - 💡 **Photosensitivity**: Advise patients to avoid excessive sun exposure and use sunscreen. - 💡 **Neurotoxicity**: May cause dizziness, confusion, hallucinations. Counsel patients, especially drivers. - 💡 **Black Box Warning**: Fluoroquinolones carry a boxed warning for serious adverse reactions (tendon, peripheral neuropathy, CNS effects). > **⚠️ Important**: This information is for educational purposes only. Always consult current prescribing information, local guidelines, and clinical judgment before prescribing.