Clinical trial Recruiting at 1 site Phase 3 Interventional Ages 18 and up

Using N-acetylcysteine with Oseltamivir for Severe Influenza in Hospitalized Adults

Official title: A Randomized, Double Blind, Placebo Controlled Trial of Intravenous N-acetylcysteine and Oseltamivir Versus Intravenous 5% Dextrose and Oseltamivir in Adults Hospitalized With Influenza Complicated by Lower Respiratory Tract Infection.

Run by Chinese University of Hong Kong · NCT03900988 · Data updated 2026-11-12

This study is testing if adding N-acetylcysteine to the usual flu treatment can help hospitalized adults with severe influenza and pneumonia feel better faster.

More Influenza trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment160 (estimated)
SponsorChinese University of Hong Kong
Academic / other
Drugs / interventionschemotherapy
Locations1 site (Hong Kong)
StatusRecruiting
StartedMay 8, 2023
Main results expectedOctober 31, 2027
Study endsDecember 31, 2027
Registry record updatedOctober 20, 2026
Trial IDNCT03900988 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults hospitalized with confirmed influenza A or B infections and evidence of lower respiratory tract involvement.

Probably not a fit

Patients with known immunocompromised conditions, severe organ failures, or those who are pregnant or lactating may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial investigates the effectiveness of intravenous N-acetylcysteine (NAC) combined with oseltamivir in adults hospitalized with severe influenza and pneumonia. The study aims to evaluate whether NAC, known for its antioxidant properties, can improve clinical outcomes by reducing inflammation in patients suffering from lower respiratory tract infections. Participants will be randomly assigned to receive either the combination treatment or oseltamivir alone, with outcomes assessed based on respiratory status and overall health improvements. The trial is designed to provide insights into the potential benefits of adjunctive NAC therapy in managing severe influenza cases.

Why it matters

Potential benefit: If successful, this treatment could significantly reduce morbidity and mortality associated with severe influenza infections.

How similar studies have gone: Previous case reports have suggested that high-dose NAC may improve clinical outcomes in similar patient populations, indicating potential for success.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* influenza A and B virus infections confirmed by polymerase chain reaction (PCR) and/or immunofluorescence assays,
* hospitalized for the management of severe manifestations of influenza,
* initiation of oseltamivir,
* clinical evidence of lower respiratory tract infection (e.g. shortness of breath, tachypnea, oxygen desaturation \<93% on room air, crepitations on auscultation, infiltrations or consolidations on chest radiograph)
* written informed consent (by the subjects, or from their next of kin if the subjects are unable to provide written consent at the time of enrollment)

Exclusion Criteria:

* use of immunosuppressants (e.g. post-chemotherapy, post-transplant, autoimmune diseases) other than systemic corticosteroids
* known immuno-compromised conditions (e.g. active haematological malignancies, HIV/AIDS patients who are on antiretroviral therapy and CD4 cell count \< 200),
* pregnancy
* lactation,
* end-stage renal failure
* hepatic failure
* cardiac failure
* patients on anticoagulation (except prophylactic dose of low molecular weight heparin),
* patients with scheduled major surgery within 2 weeks (NAC may affect blood clotting),
* patients who have received macrolide antibiotics and NSAID for 1 week prior to enrolment due to their immuno-modulating effects.
* Use of investigational anti-influenza antivirals and blood products

Where it's running

  • Prince of Wales Hospital
    Hong Kong, Hong Kong
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.