Cefpodixime

# Cefpodixime ## Overview - **Classification**: Third-generation cephalosporin antibiotic. - **Mechanism**: Inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), leading to bacterial cell lysis and death. ## Primary Indications 1. **Community-Acquired Pneumonia (CAP)** - Treatment of mild-to-moderate CAP. 2. **Acute Bacterial Exacerbation of Chronic Bronchitis (ABECB)** - For exacerbations in adults. 3. **Upper Respiratory Tract Infections (URTI)** - Pharyngitis, tonsillitis, acute sinusitis. 4. **Skin and Skin Structure Infections** - Uncomplicated cases. 5. **Urinary Tract Infections (UTI)** - Uncomplicated infections. 6. **Acute Otitis Media (AOM)** - Common pediatric indication. ## Adult Dosing ### Standard Dosing **Community-Acquired Pneumonia (CAP)** - **Dose**: **200 mg** - **Frequency**: Every 12 hours - **Route**: Oral - **Duration**: 14 days **Acute Sinusitis** - **Dose**: **200 mg** - **Frequency**: Every 12 hours - **Route**: Oral - **Duration**: 10 days **Pharyngitis/Tonsillitis** - **Dose**: **100 mg** - **Frequency**: Every 12 hours - **Route**: Oral - **Duration**: 5-10 days **Uncomplicated Urinary Tract Infection (UTI)** - **Dose**: **100 mg** - **Frequency**: Every 12 hours - **Route**: Oral - **Duration**: 7 days **Skin and Skin Structure Infections (Uncomplicated)** - **Dose**: **400 mg** - **Frequency**: Every 12 hours - **Route**: Oral - **Duration**: 7-14 days ### Dose Adjustments - **Renal Impairment**: - CrCl 30-50 mL/min: Administer usual dose every **16 hours**. - CrCl <30 mL/min: Administer usual dose every **24 hours**. - Hemodialysis: Administer 3 times/week after dialysis. - **Hepatic Impairment**: No specific dose adjustment generally needed. - **Elderly Patients**: Adjust dose based on renal function if impaired. ## Pediatric Dosing ### Neonates (0-28 days) - **Special Notes**: Cefpodoxime is **not recommended** in neonates. Limited safety and efficacy data. Potential for bilirubin displacement. ### Infants (1-12 months) - **Acute Otitis Media (AOM)** - **Dose**: **5 mg/kg** - **Frequency**: Every 12 hours - **Maximum**: **200 mg/dose** - **Pharyngitis/Tonsillitis** - **Dose**: **5 mg/kg** - **Frequency**: Every 12 hours - **Maximum**: **100 mg/dose** ### Children (1-12 years) - **Acute Otitis Media (AOM)** - **Dose**: **5 mg/kg** - **Frequency**: Every 12 hours - **Maximum**: **200 mg/dose** (Max daily: **400 mg/day**) - **Pharyngitis/Tonsillitis** - **Dose**: **5 mg/kg** - **Frequency**: Every 12 hours - **Maximum**: **100 mg/dose** (Max daily: **200 mg/day**) - **Acute Sinusitis** - **Dose**: **5 mg/kg** - **Frequency**: Every 12 hours - **Maximum**: **200 mg/dose** (Max daily: **400 mg/day**) - **Uncomplicated UTI** - **Dose**: **5 mg/kg** - **Frequency**: Every 12 hours - **Maximum**: **100 mg/dose** (Max daily: **200 mg/day**) ### Adolescents (13-18 years) - **Dose**: Use **adult dosing** guidelines. - **Maximum**: Adult maximum doses apply (e.g., up to **400 mg/dose** depending on indication). ## Safety Information ### Contraindications - **Absolute**: Known hypersensitivity to cefpodoxime or other cephalosporins. - **Absolute**: History of immediate and severe hypersensitivity reaction to penicillin (due to potential cross-reactivity). ### Common Adverse Effects - **Very Common (>10%)**: Diarrhea. - **Common (1-10%)**: Nausea, vomiting, abdominal pain, rash, headache, vaginal candidiasis. - **Serious but Rare**: *Clostridioides difficile*-associated diarrhea (CDAD), severe hypersensitivity reactions (anaphylaxis, Stevens-Johnson Syndrome, Toxic Epidermal Necrolysis), hepatotoxicity, renal impairment. ### Key Drug Interactions - **Antacids/H2 Blockers/PPIs**: Reduce cefpodoxime absorption (e.g., famotidine, omeprazole). Administer cefpodoxime **2-3 hours before** antacids/acid suppressants. - **Probenecid**: Increases cefpodoxime plasma concentrations and prolongs its half-life. Monitor for increased cefpodoxime effects. - **Warfarin**: May enhance anticoagulant effects. Monitor INR closely. - **Live Bacterial Vaccines (e.g., Typhoid)**: May decrease the therapeutic effect of the vaccine. Administer vaccine at least 24 hours after last dose of antibiotic. ## Monitoring & Follow-up - **Before Treatment**: Assess baseline renal function (CrCl). - **During Treatment**: - Monitor for signs of allergic reaction (rash, hives, difficulty breathing). - Monitor for severe or persistent diarrhea (potential for CDAD). - Monitor renal function in patients with pre-existing impairment or receiving nephrotoxic drugs. - **Clinical Signs**: Watch for improvement in infection symptoms, or worsening/new symptoms. ## Clinical Pearls - 💡 **Administration**: Take cefpodoxime with food to enhance absorption and reduce GI upset. - 💡 **Suspension Storage**: Oral suspension must be refrigerated after reconstitution and discarded after **14 days**. - 💡 **Patient Counseling**: Advise patients to report severe or bloody diarrhea immediately. - 💡 **Allergy**: Always confirm penicillin allergy history. While cross-reactivity is low for 3rd-gen cephalosporins, caution is warranted. > **⚠️ Important**: This information is for educational purposes only. Always consult current prescribing information, local guidelines, and clinical judgment before prescribing.