Clavunet

# Clavunet (Amoxicillin/Clavulanate) ## Overview - **Classification**: Penicillin antibiotic + Beta-lactamase inhibitor - **Mechanism**: Amoxicillin inhibits bacterial cell wall synthesis. Clavulanate protects amoxicillin by irreversibly binding to beta-lactamase enzymes. ## Primary Indications 1. **Acute Bacterial Sinusitis** (ABS) 2. **Acute Bacterial Otitis Media** (ABOM) 3. **Lower Respiratory Tract Infections** (e.g., CAP, acute bronchitis exacerbations) 4. **Skin and Skin Structure Infections** (e.g., animal/human bites, cellulitis, abscesses) 5. **Urinary Tract Infections** ## Adult Dosing ### Standard Dosing **Acute Bacterial Sinusitis, Community-Acquired Pneumonia (CAP)** - **Dose**: **875 mg** amoxicillin / **125 mg** clavulanate - **Frequency**: Every **12 hours** - **Route**: Oral - **Duration**: 10-14 days for ABS; 7-10 days for CAP **Acute Bacterial Otitis Media, Skin & Skin Structure Infections, UTI** - **Dose**: **500 mg** amoxicillin / **125 mg** clavulanate - **Frequency**: Every **8 hours** - **Route**: Oral - **Duration**: 7-10 days ### Dose Adjustments - **Renal Impairment**: - **CrCl >30 mL/min**: No adjustment. - **CrCl 10-30 mL/min**: **250-500 mg** amoxicillin component every **12 hours**. - **CrCl <10 mL/min**: **250-500 mg** amoxicillin component every **24 hours**. - **Hemodialysis**: **250-500 mg** amoxicillin every **24 hours**, with an additional dose during/after dialysis. - **Hepatic Impairment**: Use with caution. Monitor liver function tests closely. - **Elderly Patients**: Adjust dose based on renal function. ## Pediatric Dosing ### Neonates (0-28 days) - **Dose**: Not generally recommended due to insufficient data. - **Special Notes**: Increased risk of cholestatic jaundice and necrotizing enterocolitis. Consider alternative agents. ### Infants (1-12 months) - **Indication**: AOM, sinusitis - **Dose (Standard)**: **25 mg/kg/day** (amoxicillin component) - **Frequency**: Divided every **12 hours** (e.g., 12.5 mg/kg every 12h) - **Maximum**: **125 mg** clavulanate per dose. Max clavulanate **10 mg/kg/day** for ES formulation (e.g., 400/57). - **Formulation**: Oral suspension (e.g., 200 mg/5 mL, 400 mg/5 mL). ### Children (1-12 years) - **Indication (Standard)**: AOM, sinusitis, lower respiratory, skin infections - **Dose**: **25 mg/kg/day** (amoxicillin component) - **Frequency**: Divided every **12 hours** (e.g., 12.5 mg/kg every 12h) - **Maximum**: Max amoxicillin **1000 mg/day**. Max clavulanate **125 mg/dose**. - **Indication (High-Dose for resistant S. pneumoniae, e.g., AOM)**: - **Dose**: **90 mg/kg/day** (amoxicillin component) - **Frequency**: Divided every **12 hours** (e.g., 45 mg/kg every 12h) - **Maximum**: Max amoxicillin **4000 mg/day**. Max clavulanate **600 mg/day** (using ES formulation 600/42.9). - **Formulation**: Oral suspension (e.g., 600 mg/5 mL ES), chewable tablets. Use high-strength amoxicillin:clavulanate ratio for high-dose regimens. ### Adolescents (13-18 years) - **Dose**: Generally follow **adult dosing** guidelines. - **Maximum**: Max adult amoxicillin doses: **875 mg** per dose (12-hourly) or **500 mg** per dose (8-hourly). Max daily clavulanate **250 mg** (for 875/125) or **375 mg** (for 500/125). ## Safety Information ### Contraindications - **Absolute**: History of severe hypersensitivity reaction (e.g., anaphylaxis, SJS) to penicillins, cephalosporins, or other beta-lactams. - **Absolute**: History of cholestatic jaundice or hepatic dysfunction associated with previous amoxicillin/clavulanate use. - **Absolute**: Infectious mononucleosis (risk of maculopapular rash). ### Common Adverse Effects - **Very Common (>10%)**: Diarrhea, nausea, vomiting. - **Common (1-10%)**: Rash, candidiasis (vaginal, oral), abdominal pain. - **Serious but Rare**: Anaphylaxis, SJS, C. difficile-associated diarrhea (CDAD), hepatitis, cholestatic jaundice, hemolytic anemia, interstitial nephritis. ### Key Drug Interactions - **Warfarin**: May prolong prothrombin time (INR). Monitor INR closely, adjust warfarin dose as needed. - **Methotrexate**: May increase methotrexate levels and toxicity. Monitor for toxicity, consider alternative. - **Allopurinol**: Increased risk of rash. - **Oral Contraceptives**: May decrease efficacy (though clinical significance debated). Advise backup birth control. - **Probenecid**: Increases amoxicillin blood levels. ## Monitoring & Follow-up - **Before Treatment**: Obtain complete allergy history (penicillins, cephalosporins). - **During Treatment**: Monitor for signs of allergic reaction, persistent severe diarrhea (CDAD), and liver function (if prolonged use or history of dysfunction). - **Clinical Signs**: Watch for severe rash, difficulty breathing, jaundice, dark urine, pale stools, or bloody diarrhea. ## Clinical Pearls - 💡 **Tip 1**: Administer at the **start of a meal** to enhance absorption and minimize GI side effects (nausea, diarrhea). - 💡 **Tip 2**: Always complete the full prescribed course of therapy, even if symptoms improve, to prevent antibiotic resistance. - 💡 **Tip 3**: The clavulanate component can contribute to GI upset; high amoxicillin doses for children often use formulations with a lower clavulanate ratio (e.g., ES). - 💡 **Tip 4**: Oral suspensions must be **shaken well** before each dose and stored as directed (usually refrigerated). > **⚠️ Important**: This information is for educational purposes only. Always consult current prescribing information, local guidelines, and clinical judgment before prescribing.