Apixaban to Prevent Venous Thromboembolism in Ambulatory Lung Cancer Patients Undergoing Systemic Anticancer Treatment
THROMBO-STOP
A Phase III, Multicentre, Double Blind, Placebo-Controlled, Randomised Clinical Trial of Apixaban THROMBOprophylaxiS TO Prevent Venous Thromboembolism in Ambulatory Lung Cancer Patients Undergoing Systemic Anticancer Treatment
2 other identifiers
interventional
1,456
1 country
1
Brief Summary
The aim of this trial is to find out if a tablet called apixaban can reduce blood clots in people with lung cancer having chemotherapy or similar treatments. Apixaban is a type of oral anticoagulant ("blood thinner") that makes the blood less sticky to prevent blood clots forming. The trial is trying to find out if apixaban it can reduce blood clots in people with lung cancer. Participants will receive the following treatment:
- Apixaban or placebo, 2.5mg taken by mouth twice a day for 6 months. This treatment will be taken in addition to any treatment that they are receiving to treat their lung cancer. Participants will need to:
- Sign a consent form to enter the trial.
- Take the trial treatment as directed by the research team
- Complete a participant diary to record when they took the trial treatment
- Complete the Quality of Life and Health resource use questionnaires.
- Female participants of childbearing potential must use adequate contraception during the trial and for at least 2 days after trial treatment has finished.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for phase_3
Started Mar 2026
Typical duration for phase_3
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
July 29, 2025
CompletedFirst Posted
Study publicly available on registry
September 8, 2025
CompletedStudy Start
First participant enrolled
March 2, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
September 30, 2029
ExpectedStudy Completion
Last participant's last visit for all outcomes
March 30, 2030
September 8, 2025
September 1, 2025
3.6 years
July 29, 2025
September 1, 2025
Conditions
Outcome Measures
Primary Outcomes (1)
18.3.1.1 Objectively confirmed VTE
Difference between a composite of objectively confirmed VTE and VTE-related death in participants with lung cancer, commencing SACT or CRT, when treated with 6 months of apixaban vs. placebo.
6 months
Secondary Outcomes (12)
Objectively confirmed VTE including all cause death
6 months
Bleeding outcomes
6 months
Net clinical benefit
6 months
Proximal or distal DVT (symptomatic or incidental)
6 months
Other rates of thrombosis
6 months
- +7 more secondary outcomes
Study Arms (2)
Apixaban
EXPERIMENTALapixaban 2.5 mg twice a day for 6 months
Placebo
PLACEBO COMPARATORapixaban matched placebo twice a day for 6 months
Interventions
Eligibility Criteria
You may qualify if:
- Age ≥ 16 years
- Newly diagnosed locally advanced or metastatic primary lung cancer (histologically/ cytologically confirmed) or disease progression after complete or partial remission commencing a new course of SACT alone or as CRT
- Ambulatory (receiving outpatient SACT)
You may not qualify if:
- Hypersensitivity to apixaban or to any of the listed SmPC excipients
- Active clinically significant bleeding
- Lesion or condition considered a significant risk factor for major bleeding
- Hepatic disease associated with impaired synthetic function
- Platelet count \< 50 x 109 /L
- Elevated liver enzymes ALT/AST \> 2 x ULN or total bilirubin ≥ 1.5 x ULN
- Renal failure (creatinine clearance \< 15ml/min)
- Weight \< 40kg
- Estimated life expectancy \< 6 months
- Continuous anticoagulation (e.g., unfractionated heparin, low molecular weight heparins, heparin derivatives and oral anticoagulants) for other medical conditions
- The usage of medications contraindicated with apixaban
- Pregnancy
- Breast feeding
- Judgement by the Investigator that the participant is unsuitable to participate in the trial and the participant is unlikely to comply with trial procedures, restrictions and requirements
- Inability to consent
- +2 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
University of Birmingham
Birmingham, B15 2TT, United Kingdom
MeSH Terms
Interventions
Study Officials
- PRINCIPAL INVESTIGATOR
Michael Newnham, MBChB, MSc, MRCP, PhD
University of Birmingham
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- QUADRUPLE
- Who Masked
- PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
- Masking Details
- Sponsor's clinical trial management team other than the trial statisticians
- Purpose
- PREVENTION
- Intervention Model
- PARALLEL
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
July 29, 2025
First Posted
September 8, 2025
Study Start
March 2, 2026
Primary Completion (Estimated)
September 30, 2029
Study Completion (Estimated)
March 30, 2030
Last Updated
September 8, 2025
Record last verified: 2025-09
Data Sharing
- IPD Sharing
- Will share
- Shared Documents
- STUDY PROTOCOL
- Time Frame
- IPD and supporting information will be available within 12 months of the primary publication.
- Access Criteria
- Data anonymised in compliance with the Information Commissioners Office requirements, using a procedure based on guidelines from the Medical Research Council (MRC) Methodology Hubs and Information Commissioners Office, will be available for sharing with researchers outside of the trials team within 12 months of the primary publication.
There is a plan to make IPD and related data dictionaries available after the end of the study.