Co-Amoxiclav is contraindicated in patients with a history of hypersensitivity to penicillin and in patients who are sensitive to amoxicillin & potassium injection-associated cholestatic jaundice or hepatic dysfunction. Patients with suspected glandular fever, pharyngitis should not be given amoxicillin & potassium injection as the amoxicillin component is likely to cause a maculopapular rash.