Amoxycillin and flucloxacillin - generally exhibit an additive effect against sensitive bacteria and bacteria that are sensitive to amoxycillin or to flucloxacillin remain sensitive to the combination, showing that antagonism does not occur when the two components are combined.typical indications include:acute and chronic bronchitis pelvic inflammatory diseasepneumonia urinary tract infectionsear, nose and throat infections skin and soft tissue infectionsgynaecological infections