Amoxicillin Trihydrate

Clinical trials investigating “Amoxicillin Trihydrate” are studying how it performs in different patient groups and diseases. These studies look at outcomes such as treatment success, infection control, and safety in children, adults, and special patient groups. The trials include several phase 3 studies and focus on real-world clinical questions.

Table of contents

Clinical trial overview

Across the source data, Amoxicillin Trihydrate is being studied in several interventional trials, mostly in Phase 3 settings.[1][2][3] These trials ask practical questions about whether different antibiotic strategies work better, work as well as another approach, or help prevent later problems.[1][4]

The studies include children, healthy adults, people with penicillin allergy, and patients with serious infections or complex medical conditions.[2][3][5]

Trials in children with pneumonia

One major study, SPARE, is testing Amoxicillin Trihydrate in children with community-acquired alveolar pneumonia, which means pneumonia caught outside the hospital.[1] The trial includes children between 3 and 59 months of age and compares shorter antibiotic treatment with longer treatment plans.[1]

The main endpoint is therapeutic failure at day 7, which includes a need to change antibiotics, restart or continue antibiotics after day 7, or hospitalization or death linked to worsening pneumonia.[1] The study is designed to show non-inferiority, meaning the shorter treatment should not be meaningfully worse than the longer one.[1]

A second pediatric study, the NAPIC Study, looks at preschool children with lower respiratory tract infection and compares amoxicillin with placebo.[2] Its main outcome is therapy failure by 21 days after treatment start.[2]

Trials on infection prevention and allergy testing

The PROSPECTOR 2 trial studies people with penicillin allergy and compares a prolonged oral penicillin challenge with a single-dose challenge to find out who truly has an immune-mediated allergy.[3] The primary outcome is a positive oral challenge, meaning an immune reaction up to day 7 after the first test dose, judged by an independent blinded panel.[3]

The PREV-CART study includes young adults and adults aged 16 to 80 who have B-cell acute lymphoblastic leukemia or B-cell lymphoma and have been treated with CAR-T cells.[5] It compares immunoglobulin replacement therapy with antibiotic prophylaxis, which means preventive antibiotic treatment, and includes Amoxicillin Trihydrate among the listed medicines.[5]

The main endpoint is a composite outcome of recurrent infections or severe infection requiring hospitalization within 12 months after randomization.[5]

Trials after surgery and dental procedures

One trial studies patients after surgical drainage of a perianal abscess, which is a painful pocket of infection near the anus.[6] The goal is to see whether antibiotic therapy after surgery can prevent the later development of an anal fistula, an abnormal tunnel that can form after infection.[6]

Another study looks at healthy patients undergoing dental implant surgery and compares different antibiotic protocols that include amoxicillin by mouth.[7] The main endpoint is mean bone loss, which is used to judge how well the tissue around the implant heals.[7]

Trials in serious infections and heart disease

The ROSIE study focuses on infective endocarditis, a serious infection of the heart lining or valves.[4] It tests whether a standardized local protocol for partial oral consolidation therapy is non-inferior, meaning not worse than the comparison approach by more than an allowed margin.[4]

The main endpoint is composite clinical success at 6 months, defined as no death from any cause, no unplanned heart surgery, no embolic events, and no recurrent bacteremia, which means bacteria returning in the blood.[4]

The Antibiotic Treatment Trial in Acute Coronary Syndrome includes patients with NSTEMI, STEMI, or coronary artery disease.[8] It studies whether antibiotic treatment can reduce major adverse cardiac and cerebrovascular events over 12 months.[8]

Main endpoints and what they mean

The trials use different endpoints depending on the condition being studied.[1][2][4][7] Common outcomes include treatment failure, infection recurrence, bone loss, fistula formation, and serious clinical events such as death or stroke.[1][4][7][8]

Some trials measure a single main event, while others use a composite outcome, which combines several important events into one result.[4][5]

Who can participate

Participation depends on the specific trial and diagnosis.[1][2][3] The source data show trials for young children with pneumonia, healthy adults having dental implant surgery, people with penicillin allergy, adults with infective endocarditis, patients with diabetic foot osteomyelitis, and adults after CAR-T treatment.[1][3][4][5][7]

Several studies are authorised and enrolling large groups, which suggests active research on how Amoxicillin Trihydrate may fit into different treatment strategies.[1][5][8]

Trial ID Phase Condition studied Status Enrollment
NCT06291012 Phase 3 Community-acquired alveolar pneumonia in children Authorised 1100
NCT20171863 Phase 3 Lower respiratory tract infection / pneumonia in preschool children Authorised 500
2025-521571-30-00 Phase 3 CAR-T treated B-cell acute lymphoblastic leukemia or B cell lymphoma Authorised 228
2025-520888-41-00 Phase 3 Penicillin allergy Authorised 712
2025-524484-20-00 Phase 3 Infective endocarditis Authorised 152
2025-524723-52-00 Phase 3 Diabetic foot osteomyelitis Authorised 84
2024-520193-35-00 Phase 3 Perianal abscess after surgery Authorised 300
2025-522136-14-00 Low Intervention Acute coronary syndrome / myocardial infarction Authorised 1070
2023-510391-31-00 Phase 3 Dental implant surgery in healthy patients Authorised 80

Ongoing Clinical Trials on Amoxicillin Trihydrate

  • Study of Switching from Intravenous to Oral Antibiotics in Patients with Infective Endocarditis Using a Drug Combination

    Recruiting

    1 1 1 1
    Investigated diseases:
    Belgium
  • A Study Testing Prolonged versus Single Dose Penicillin Challenge in Patients with Suspected Penicillin Allergy Using Amoxicillin

    Recruiting

    1 1
    Investigated drugs:
    Belgium Denmark
  • Study on the Effect of Amoxicillin in Preschool Children with Pneumonia

    Recruiting

    1 1 1
    Investigated drugs:
    Norway
  • Comparing human normal immunoglobulin (iv) and a drug combination to prevent infections in adults with B-cell acute lymphoblastic leukemia or B-cell lymphoma treated with CAR-T cells

    Not yet recruiting

    1 1 1 1
    Investigated diseases:
    France
  • Comparing local gentamicin or vancomycin hydrochloride to a drug combination for patients with diabetic foot osteomyelitis

    Not yet recruiting

    1 1 1 1
    Investigated diseases:
    Finland
  • Study of ceftriaxone and amoxicillin treatment in patients with acute coronary syndrome, non-ST-elevation myocardial infarction, or ST-elevation myocardial infarction

    Not yet recruiting

    1 1 1 1
    Finland
  • Study on Amoxicillin and Potassium Clavulanate for Preventing Anal Fistula in Patients After First Perianal Abscess Surgery

    Not yet recruiting

    1 1 1 1
    Investigated diseases:
    Investigated drugs:
    Spain
  • Study on Reducing Antibiotic Duration for Pneumonia in Children Using Amoxicillin

    Not yet recruiting

    1 1 1 1
    Investigated diseases:
    Investigated drugs:
    France
  • A Study of Short-term vs Long-term Amoxicillin Treatment in Healthy Patients Undergoing Dental Implant Surgery: Effects on Peri-implant Tissue Health

    Not recruiting

    1 1 1 1
    Investigated drugs:
    Italy

Glossary

  • Phase 3: A late-stage clinical trial that tests how well a treatment works and continues to monitor safety in larger groups of people.
  • Interventional study: A study where researchers assign a treatment or strategy to participants and then measure the results.
  • Primary outcome: The main result the trial is designed to measure.
  • Therapeutic failure: When the treatment does not work well enough and the patient needs a change in treatment or gets worse.
  • Non-inferiority: A study question asking whether one treatment is not worse than another by more than a small, planned amount.
  • Perianal fistula: An abnormal tunnel near the anus that can happen after a perianal abscess.
  • Peri-implant tissue: The gum and bone tissue around a dental implant.
  • Resistome: The collection of genes in bacteria that can help them resist antibiotics.
  • Composite outcome: A result that combines several different events into one main endpoint.
  • Hospitalization: Being admitted to the hospital for treatment or close monitoring.

References

  1. https://clinicaltrials.eu/trial/study-on-reducing-antibiotic-duration-for-pneumonia-in-children-using-amoxicillin/
  2. https://clinicaltrials.eu/trial/study-on-the-effect-of-amoxicillin-in-preschool-children-with-pneumonia/
  3. https://clinicaltrials.gov/study/2025-520888-41-00
  4. https://clinicaltrials.gov/study/2025-524484-20-00
  5. https://clinicaltrials.gov/study/2025-521571-30-00
  6. https://clinicaltrials.gov/study/2024-520193-35-00
  7. https://clinicaltrials.gov/study/2025-524723-52-00
  8. https://clinicaltrials.gov/study/2025-522136-14-00
  9. https://clinicaltrials.gov/study/2023-510391-31-00