Amox%2520cv

#Amoxicillin/Clavulanate (Co-amoxiclav) ## Overview A beta-lactam antibiotic combining amoxicillin (a penicillin) with clavulanate (a beta-lactamase inhibitor) to overcome resistance in certain bacteria. ## Primary Indications - Acute otitis media, sinusitis, community-acquired pneumonia - Lower respiratory tract infections (e.g., exacerbations of COPD) - Urinary tract infections (especially recurrent or complicated) - Skin and soft tissue infections (e.g., bite wounds, diabetic foot) - Intra-abdominal infections (as part of combination therapy) ## Adult Dosing - **Mild-moderate infection**: 500/125 mg orally every 8 hours (or 875/125 mg every 12 hours) - **Severe infection**: 875/125 mg every 12 hours or 500/125 mg every 8 hours (higher amoxicillin component preferred) - **IV**: 1.2 g (1000/200 mg) every 6–8 hours; dose up to 2.2 g every 8 hours for severe infections - **Max daily amoxicillin**: 3 g orally (for standard dosing); IV up to 8–12 g in severe cases (local protocol) ## Pediatric Dosing - **Weight-based**: 25–45 mg/kg/day of amoxicillin component divided every 12 hours (standard) or every 8 hours (higher dose) - **Otitis media/pneumonia** (higher dose): 80–90 mg/kg/day amoxicillin component divided every 12 hours (especially when resistance suspected) - **IV**: 30 mg/kg/dose (amoxicillin component) every 8 hours; max 1.2 g/dose per local protocol - **Maximum doses** depend on formulation; follow local guidelines ## Dose Adjustments - **Renal impairment**: - CrCl 10–30 mL/min: 250–500 mg amoxicillin every 12 hours (avoid prolonged intervals) - CrCl <10 mL/min: 250–500 mg amoxicillin every 24 hours (avoid extended-release) - **Hepatic impairment**: Caution, no specific dose adjustment; monitor LFTs - **Dialysis**: Administer after dialysis ## Contraindications - History of hypersensitivity to penicillins or beta-lactams - Cholestatic jaundice or hepatic impairment from previous amoxicillin/clavulanate use - Infectious mononucleosis (risk of rash) ## Adverse Effects - **Common**: Diarrhea (most frequent), nausea, rash, vaginitis - **Serious**: Clostridioides difficile colitis, seizures (high doses, renal impairment), hepatotoxicity (especially in elderly, prolonged use), Stevens-Johnson syndrome - **Allergic**: Anaphylaxis, angioedema ## Key Drug Interactions - Warfarin: increased INR (monitor) - Methotrexate: reduced clearance, toxicity risk - Allopurinol: increased rash risk - Oral contraceptives: possible reduced efficacy (consider backup method) - Probenecid: decreases renal excretion of amoxicillin ## Monitoring - Renal and hepatic function (especially with prolonged therapy or renal impairment) - Signs of superinfection, C. difficile colitis - Complete blood count if treatment >10 days - Observe for allergic reactions (first dose monitoring) ## Clinical Pearls - Take with food to reduce GI side effects - Do not substitute for amoxicillin alone if clavulanate needed - Use higher-dose formulation (e.g., 875/125 mg) for resistant bacteria (e.g., S. pneumoniae) - Avoid in patients with penicillin allergy; cross-reactivity with cephalosporins is low but possible - Extended-release formulation (Augmentin XR) is for adults with specific indications (e.g., sinusitis, pneumonia) – not interchangeable *This information is for educational purposes. Always verify current prescribing information, local protocols, and individual patient factors before dispensing or administering.*