O'Donnell is a pharmacist with board certification in pharmacotherapy and geriatrics. She has experience in hospital and outpatient antimicrobial stewardship and infectious disease.
In May 2026, the FDA approved a combination product of cefepime and zidebactam for the treatment of complicated urinary tract infections, including pyelonephritis, providing a new treatment option for multidrug-resistant gram-negative organisms. Here is a clinical overview of the newly approved antibiotic.
Fluoroquinolones are broadly active and convenient, but black box warnings and resistance concerns have reshaped when and how clinicians should use them.
In 2018, the FDA approved omadacycline as a new oral/intravenous third generation tetracycline to treat Community Acquired Bacterial Pneumonia (CABP) and Acute Bacterial Skin and Skin Structure Infections (ABSSSI). Here is a clinical overview of omadacycline as well as recent phase 2 clinical trial results favoring oral omadacycline as an oral treatment option for Mycobacterium abscessus pulmonary disease.
In 2025, the Infectious Diseases Society of America published the first part of an update to the clinical practice guideline on the diagnosis and management of GAS pharyngitis. Here is an overview of the risk assessment and antibiotic treatment of GAS pharyngitis.
This past December, the FDA approved both zoliflodacin and gepotidacin for this sexually transmitted infection marking a significant advance amid rising antibiotic resistance. Here is an overview of the antibiotics.
