for people ages 3 months to 18 years (full criteria)
at San Francisco, California and other locations
study started
estimated completion:
Ngoc Ly



The primary objective of this study is to evaluate the safety and efficacy of a 14-day course versus a 28-day course of aztreonam for inhalation solution (AZLI) in participants with new onset Pseudomonas aeruginosa respiratory tract infection.

Official Title

Randomized, Double-Blind, Phase 3B Trial to Evaluate the Safety and Efficacy of 2 Treatment Regimens of Aztreonam 75 mg Powder and Solvent for Nebulizer Solution / Aztreonam for Inhalation Solution (AZLI) in Pediatric Subjects With Cystic Fibrosis (CF) and New Onset Respiratory Tract Pseudomonas Aeruginosa (PA) Infection/Colonization


Pseudomonas Aeruginosa Respiratory Tract Infection Cystic Fibrosis Infection Communicable Diseases Fibrosis Respiratory Tract Infections Pseudomonas Infections Aztreonam AZLI


For people ages 3 months to 18 years

Key Inclusion Criteria:

  • Diagnosis of Cystic Fibrosis (CF) as determined by the 2008 CF Consensus Conference criteria: Sweat chloride level ≥ 60 milliequivalents per liter (mEq/L) by quantitative pilocarpine iontophoresis; or a genotype with 2 identifiable mutations consistent with CF; or an abnormal nasal transepithelial potential difference (NPD), and 1 or more clinical features consistent with CF
  • Documented new onset of positive respiratory tract culture for PA within 30 days of screening defined as either first lifetime documented PA-positive culture, or PA recovered after at least a 2-year history of PA-negative respiratory cultures (at least 2 cultures per year)
  • Forced expiratory volume in one second (FEV1) ≥ 80% predicted (for subjects ≥ 6 years of age who can reliably perform spirometry assessments)
  • Clinically stable with no evidence of acute significant respiratory symptoms that would require administration of IV antipseudomonal antibiotics, oxygen supplementation, or hospitalization

Key Exclusion Criteria:

  • Use of IV or inhaled antipseudomonal antibiotics within 2 years of screening
  • Use of oral antipseudomonal antibiotics for a respiratory event within 30 days of study entry (screening visit)
  • History of intolerance to inhaled short acting β2 agonists
  • History of lung transplantation
  • Current requirement for daily continuous oxygen supplementation or requirement of more than 2 L/minute at night
  • Hospitalization for a respiratory event within 30 days prior to screening
  • Changes in bronchodilator, corticosteroid, dornase alfa, or hypertonic saline medications within 7 days prior to screening.
  • Significant changes (per investigators discretion) in physiotherapy technique or schedule within 7 days prior to screening
  • Abnormal renal or hepatic function results at most recent test within the previous 12 months, defined as Aspartate aminotransferase (AST) or alanine aminotransferase (ALT)> 5 times upper limit of normal (ULN), or Serum creatinine > 2 times ULN for age
  • Presence of a condition or abnormality that would compromise the subject's safety or the quality of the study data, in the opinion of the Investigator
  • Known hypersensitivity to aztreonam, its metabolites, or formulation excipients in AZLI
  • Respiratory cultures performed within 24 months prior to screening that are positive for ANY Burkholderia spp. or Non-tuberculous Mycobacteria (NTM)

Note: Other protocol defined Inclusion/Exclusion criteria may apply


  • University of California San Francisco (UCSF) - Benioff Children's Hospital not yet accepting patients
    San Francisco California 94158 United States
  • Ventura County Medical Center not yet accepting patients
    Ventura California 93003 United States

Lead Scientist

  • Ngoc Ly
    My research has focused on the influences of heredity, as well as prenatal and infant environmental exposures ( including environmental, microbial, and nutritional influences) on immune responses and clinical symptoms of allergy and asthma.


accepting new patients
Start Date
Completion Date
Gilead Sciences
Phase 3
Study Type
Last Updated