<prompt> Which of the following beta lactam antibiotic can be safely used in a patient with a history of allergy to PencillinAztreonanCefepimeLoracarbefCeftriaxone  <response>: Refer KDT 6e p708 Aztreonan is the only beta lactam anti6 that can be used in patients having severe allergy to Pencillin or cephalosporin 