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  • Known contraindication to co-amoxiclav
  • Child given antibiotics within the last 72 hours
  • Child requires immediate antibiotics or hospital admission (clinician’s judgement)
  • Any reason to prevent healthcare professional from obtaining high nasal swab
  • Child with known cystic fibrosis
  • Child previously entered into the ARCHIE study
  • Child has been involved in another medicinal trial within the last 90 days

Contraindications to co-amoxiclav

  • Known hypersensitivity to beta-lactam antibiotics or clavulanic acid
  • History of jaundice or hepatic impairment due to co-amoxiclav
  • Severe liver disease§§ (as defined in 'at risk' categories)
  • Known or suspected infectious mononucleosis
  • Known lymphocytic leukaemia
  • Known phenylketonuria
  • eGFR less than 30 ml/min/1.73m2  (based on most recent measurement within the last 12 months)
  • Currently taking any medications known to interact with co-amoxiclav (e.g. probenecid, sulfasalazine, methotrexate, digoxin, oral anticoagulants) or increase the risk of adverse reactions to co-amoxiclav (allopurinol)