Last reviewed 2026-04-20 · How we verify

FENO

At a glance

Approved indications

No approved indications tracked.

Common side effects

• Abnormal Liver Tests
• Abdominal Pain
• Increased ALT
• Increased AST
• Increased Creatine Phosphokinase
• Constipation
• Rhinitis
• Rash
• Urticaria

Serious adverse events

• Mortality and Coronary Heart Disease Morbidity
• Hepatotoxicity
• Myopathy and Rhabdomyolysis
• Increases in Serum Creatinine
• Cholelithiasis
• Increased Bleeding Risk with Coumarin Anticoagulants
• Pancreatitis
• Hematologic Changes
• Hypersensitivity Reactions
• Venothromboembolic Disease

Key clinical trials

• Use of fenoTRACK Device for Monitoring Changes of Fractional Exhaled Nitric Oxide (FeNO) in Uncontrolled Asthma Subjects and Controlled Asthma Subjects
• Understanding Inflammation, InFection and Interventions in Severe Exacerbations of Cystic Fibrosis
• Identifying the Causes and Risk Factors of Pulmonary Exacerbations in Cystic Fibrosis
• Assess Accuracy of Primary Care Asthma and COPD Diagnosis Using Oscillometry and FeNO vs Specialist Diagnosis
• Design, Development and Evaluation of a Digital Health Assistant for Paediatric Asthma
• Investigation and Classification of Treatable Traits in Patients With Chronic Airway Diseases
• Exposure of Taxi Drivers to Ultrafine Particles and Black Carbon Within Their Vehicles (NA)
• Structured Review: To Optimise Management and Prevent Harm in COPD (NA)

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

• FENO CI brief — competitive landscape report
• FENO updates RSS · CI watch RSS
• Salix portfolio CI