Co-amoxiclav Dosage and Treatment for Pediatric Skin Infections

Dosage Calculation

For children from birth to 1 year, the British Thoracic Society guidelines recommend co-amoxiclav at a dose of 0.266 ml/kg of the 125/31 suspension three times daily 2, 1
For an 11kg child, this calculates to approximately 3 ml of the 125/31 suspension three times daily 1
In cases of severe infections, the dose may be doubled according to the guidelines 1
The recommended duration of treatment is 7-10 days, which may be extended to 14 days depending on clinical response 1

Co-amoxiclav is effective against Staphylococcus aureus, the most common pathogen in boils, as it combines amoxicillin with clavulanic acid to overcome β-lactamase producing organisms 3
The addition of clavulanate preserves the activity of amoxicillin in the presence of β-lactamases, making it effective against skin infections where β-lactamase producing organisms are common 3

For children 1-6 years old, an alternative fixed dosing of 5 ml of 125/31 suspension three times daily can be used 1
However, for skin infections like boils where adequate antimicrobial coverage is essential, the standard three times daily regimen is preferred to maintain consistent blood levels 1

If the boil is large, fluctuant, or accompanied by significant surrounding cellulitis, consider incision and drainage as the primary treatment 4
Potentially doubling the dose in severe infections as mentioned in the guidelines 1
Monitor for clinical improvement within 48-72 hours; if no improvement is seen, reassess the diagnosis and consider changing the antimicrobial agent 5

Underdosing is a common error in pediatric prescribing; ensure accurate weight-based calculations 6
Failure to complete the full course of antibiotics may lead to treatment failure and potential resistance 1
Not considering drainage for fluctuant boils - remember that antibiotics alone may be insufficient for abscesses that require drainage 4