RESUMEN
BACKGROUND: The efficacy of conventional doses of piperacillin/ tazobactam (PTZ) plus amikacin (AMK) were compared retrospectively to low doses of cefepime (CEF) plus amikacin in high risk febrile neutropenic patients with an underlying hematologic malignancy, and CEF versus PTZ (without AMK) in low risk individuals with febrile neutropenia and underlying solid tumor malignancies. METHODS: Fifty-six high risk hematologic malignancy patients received a combination of PTZ 4.5 grams administered every 8 hours plus AMK 15 mg/kg/day, while 46 received CEF 1 gram administered every 12 hours plus AMK 15 mg/kg/day. In addition, 19 febrile neutropenic individuals with underlying solid malignancies received PTZ 4.5 grams every 8 hours and 25 received CEF 1 gram every 12 hours. All patients were treated in an isolation unit section of a general internal medicine ward. RESULTS: There was no significant difference between the groups in terms of age, depth of neutropenia, microbiologic result, morbidity, length of hospital stay or mortality. CONCLUSION: PTZ and CEF in combination with AMK were equally efficacious in neutropenic patients with hematologic malignancies. In addition, monotherapy with CEF or PTZ proved to be equally efficacious in neutropenic patients with solid tumors. Low dose CEF is safe and allows a reduction of cost and less antibiotic exposure.