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Could 5 days of tamiflu be enough to stop the flu?

NCT ID NCT07496736

Prevention Sponsor: University Medical Centre Ljubljana Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study compares a 5-day versus a 10-day course of oseltamivir (Tamiflu) to prevent influenza in people exposed to the virus while in the hospital. About 200 adults with flu risk factors will be randomly assigned to one of the two treatment lengths. The goal is to see if the shorter course works just as well.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
oseltamivir
What this could lead to
If successful, a shorter 5-day course could be just as effective as 10 days for preventing flu after exposure, reducing side effects and costs.
What could go wrong
This is a non-inferiority trial, so it may show the shorter course is slightly less effective. Results may not apply to people outside hospitals or those with severe illness.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

About 200 people

The number the study aims to enrol. It can still change while the study runs.

Started

Dec 2025

Expected to finish

Mar 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 18 years or older * exposure to influenza during hospitalization * risk factors for influenza complications * consent for participation obtained Exclusion Criteria: * younger than 18 years * hematological malignancy * hospitalized in intensive care unit * refusal to participate

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Conditions

The condition(s) this trial relates to.

influenza prevention target

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Influenza

Contacts and locations

Locations

  • University Medical Centre Ljubljana

    Ljubljana, 1000, Slovenia

More trials for these conditions

Other studies related to the condition(s) this trial covers.