Clinical trial Recruiting at 2 sites Phase2; Phase3 Interventional Ages 18 and up

New treatment options for hospitalized people with Lassa fever in West Africa

Official title: Efficacy, Tolerability and Safety of New or Repurposed Drugs Against Lassa Fever in West African Countries

Run by Irrua Specialist Teaching Hospital · NCT06212336 · Data updated 2026-11-12

This trial will try several antiviral and supportive drugs to see which works best to prevent death or organ failure in people hospitalized with confirmed Lassa fever.

More Lassa Fever trials

Quick facts

PhasePhase2; Phase3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment1755 (estimated)
SponsorIrrua Specialist Teaching Hospital
Academic / other
Locations4 sites (Suacoco, Bong County and 3 other locations)
StatusRecruiting
StartedMay 2, 2025
Main results expectedJune 2027
Study endsJune 2027
Registry record updatedFebruary 4, 2026
Trial IDNCT06212336 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Hospitalized adolescents and adults with PCR-confirmed Lassa fever who meet local hospitalization criteria and can provide informed consent (or have a legally authorized representative) are eligible.

Probably not a fit

People who are pregnant, have contraindications to the study drugs, have already received specific anti-Lassa drug therapy before enrollment, or have received an LF vaccine are unlikely to benefit from joining this trial.

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

What this trial studies

INTEGRATE is a multinational, multicentre, randomized, open-label platform that moves seamlessly from phase II to phase III to compare multiple investigational drugs against standard of care in hospitalized Lassa fever patients. Participants are randomized to one of several arms including favipiravir, ribavirin, dexamethasone, or high- and low-dose ARN-75039, with outcomes compared to the local standard-of-care drug. The primary outcome is prevention of death or organ failure, while secondary work includes safety, virology, biological markers, and pharmacokinetic/pharmacodynamic modelling to guide dosing. The trial is conducted at participating hospitals in West Africa with coordination among academic and clinical partners.

Why it matters

Potential benefit: If successful, the trial could identify safer and more effective treatments that reduce deaths and organ failure from Lassa fever.

How similar studies have gone: Ribavirin is the only widely used treatment but has limited and uncertain evidence, while antivirals like favipiravir and ARN-75039 have shown promise in preclinical work and small studies but lack definitive phase II/III proof in humans.

Who can join: the full rules

Show full inclusion / exclusion criteria
1. General

   Inclusion criteria
   * Clinical disease with signs and symptoms suggestive for LF
   * Positive plasma LASV RT-PCR
   * Participant requires hospitalization per the local guidelines
   * Participant or their legally authorized representative is able and willing to sign the informed consent

   Exclusion criteria
   * Unwilling to provide informed consent
   * Positive pregnancy test
   * Unwilling to provide informed consent
   * History of allergic reaction or other contra-indication to ribavirin according to the Reference safety document
   * Received drug therapy for Lassa fever (excluding supportive care) prior to inclusion
   * Has received a vaccine against LF
2. Sub-protocols

   2.1 Favipiravir high dose sub-protocol

   Inclusion criteria • Age ≥ 18 years old

   Exclusion criteria • Pregnancy (evidenced by positive urine pregnancy test in women of child-bearing potential)
   * Treatment contraindicated with favipiravir according to the Reference safety document
   * Pre-existing liver failure
   * Severe symptomatic gout/hyperuricemia
   * History of QT prolongation or arrhythmia or other cardiac disorders
   * PR interval ≥ 200 ms
   * Hypersensitivity to excipients
   * Inability to take oral drug (e.g. encephalopathy, severe vomiting)

   2.2. Favipiravir-Ribavirin sub-protocol

   Inclusion criteria

   • Age ≥ 18 years old

   Exclusion criteria
   * Pregnancy (evidenced by positive urine pregnancy test in women of child-bearing potential)
   * Treatment contraindicated with favipiravir according to the Reference safety document
   * Pre-existing liver failure
   * Severe symptomatic gout/hyperuricemia
   * History of QT prolongation or arrhythmia or other cardiac disorders
   * PR interval ≥ 200 ms
   * Hypersensitivity to excipients
   * Inability to take oral drug (e.g. encephalopathy, severe vomiting)

   2.3. Dexamethasone sub-protocol

   Inclusion criteria • Age ≥ 12 years old

   Exclusion criteria

   • Pregnancy (evidenced by positive urine pregnancy test in women of child-bearing potential)

   • Known intolerance and contra-indications to ribavirin or dexamethasone

   • Patients who already received a corticosteroid within the preceding 7 days

   2.4 ARN-75039 subprotocols

   Exclusion criteria • History of severe gastrointestinal disease

   • History of chronic generalized pruritus
   * History of severe chronic liver disease
   * History of severe cardiac disorder

Where it's running

  • Irrua Specialist Teaching Hospital
    Irrua, Edo, Nigeria
    Recruiting
  • Federal Medical Center Owo
    Owo, Ondo State, Nigeria
    Recruiting
  • Phebe Hospital
    Suacoco, Bong County, Liberia
    Not yet recruiting
  • Abubakar Tafawa Balewa University Teaching Hospital
    Bauchi, Nigeria
    Not yet recruiting

Study contacts

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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.
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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.