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Not yet recruitingNCT06452342T-REX HMBUpdated Jun 12, 2024

TRanEXamic Acid to Decrease Heavy Menstrual Bleeding in Individuals Anticoagulated for Venous Thromboembolism Pilot Study

A Phase 4 interventional study of Tranexamic acid and No Tranexamic acid in Venous Thromboembolism, Venous Thromboses and Heavy Menstrual Bleeding, sponsored by University Health Network, Toronto. Not yet recruiting. Open to participants aged 18 Years to 99 Years. Per ClinicalTrials.gov, last updated 2024-06-12.

Sponsored by University Health Network, Toronto · Phase 4, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Apr 2026, 6 months ago, but the record still lists the study as not yet recruiting.
Phase
Phase 4
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
18 Years to 99 Years
Sex
All
01

Study summary

T-REX HMB is a pilot randomized controlled trial (RCT) designed to assess the feasibility of a full trial comparing tranexamic acid (TXA) to placebo in decreasing HMB in premenopausal individuals anticoagulated for VTE. Strong data supports TXA as an effective and safe agent at decreasing HMB in the general population, but its use in those with VTE has been limited by a lack of data for its efficacy in anticoagulated individuals and theoretical concerns of its prothrombotic effects.

02

Conditions studied

  • Venous Thromboembolism
  • Venous Thromboses
  • Heavy Menstrual Bleeding
  • Anticoagulants and Bleeding Disorders
03

In context

Menorrhagia

182 studies on the registry are indexed under Menorrhagia; 33 are open to participants now.

This study's planned enrollment of 20 is below the median of 100 across 133 interventional studies indexed under Menorrhagia.

Browse Menorrhagia studies →

Lead sponsor

University Health Network, Toronto is the lead sponsor of 1,411 studies on the registry; 292 are open to participants now.

Of its 17 completed or terminated interventional studies of FDA-regulated products, 3 (18%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 99 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. Adult pre-menopausal individuals with regular menstrual cycles (defined as menstrual bleeding every 24 to 38 days)
  2. Diagnosed with acute VTE on objective imaging;
  3. Within two weeks of starting treatment with therapeutic dose anticoagulation;
  4. Planned treatment of at least 3 months of therapeutic dose anticoagulation.
  5. Written informed consent in accordance with federal, local and institutional guidelines.

Exclusion criteria

Exclusion Criteria:

  1. Hypersensitivity or allergy to TXA
  2. Active major bleeding other than menstrual bleeding
  3. Use of hormonal contraceptives
  4. Known history of thrombosis and antiphospholipid syndrome (including those patients that are triple positive for lupus anticoagulant, anticardiolipin antibodies, and anti-beta 2-glycoprotein I antibodies.
  5. Known renal insufficiency
  6. Pregnant or breastfeeding
  7. Use of other thrombotic agents
  8. Under 18 years of age
  9. Patient is unable to provide informed consent (lacking capacity, language etc)
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
20 participants (estimated)

Study arms

  • Experimental
    Tranexamic acid

    Tranexamic acid (Cyclokapron®) 1.5 grams, orally, three times a day during menstrual cycle for the 3 month study period.

    Drug: Tranexamic acid

  • Other
    No tranexamic acid

    Routine clinical care without Tranexamic acid

    Other: No Tranexamic acid

Interventions

  • DrugTranexamic acid

    Tranexamic acid 1.5 grams, orally, three times a day during menstrual cycle for the 3 month study period

    Also known as: Cyclokapron

  • OtherNo Tranexamic acid

    Routine clinical care without Tranexamic acid

06

What researchers measure

Primary outcomes

  1. Participant recruitment to study

    Number of participants successfully recruited to the study and randomized to a treatment arm

    Time frame: 3 months

Secondary outcomes

  1. Participant adherence to the study drug

    Defined as the proportion of menstrual days in which TXA was taken

    Time frame: 3 months

  2. Participant compliance with study procedures

    Defined as \>75% study drug adherence and no missed follow up visits

    Time frame: 3 months

  3. Loss to follow-up or drop-out

    Time frame: 3 months

Other outcomes

  1. Menstrual blood loss per menstrual cycle

    Measured by the pictorial blood loss assessment chart (PBAC). The PBAC has a minimum value of 0 and no maximum value, with a higher score indicating a worse outcome.

    Time frame: 3 months

  2. Menstrual blood loss in days

    Menstrual blood loss in days, over total study follow up time;

    Time frame: 3 months

  3. Menstrual blood loss in days with PBAC > 5

    Menstrual blood loss in days with PBAC \> 5, over total study follow up time

    Time frame: 3 months

  4. Major bleeding events

    As defined by the International Society on Thrombosis and Haemostasis (ISTH)

    Time frame: 3 months

  5. Clinically relevant non-major bleeding

    As defined by the International Society on Thrombosis and Haemostasis (ISTH)

    Time frame: 3 months

  6. Ferritin

    Ferritin blood work

    Time frame: 3 months

  7. Hemoglobin

    Hemoglobin blood work

    Time frame: 3 months

  8. Recurrent venous thromboembolism

    Objectively confirmed on appropriate diagnostic imaging

    Time frame: 3 months

  9. Symptoms of post thrombotic syndrome

    Symptoms of post thrombotic syndrome at 3 months using the Venous Insufficiency Epidemiological and Economic Study - Quality of Life (VEINES-QOL) survey in those with previous DVT. The VEINES-QOL survey has a minimum value of 0 and a maximum value of 118, with a higher score indicating a better outcome.

    Time frame: 3 months

  10. QOL after PE

    QOL (quality of life) after PE at 3 months using the PEmb-QOL (Pulmonary Embolism - Quality of Life) survey in those with previous PE. The PEmb-QOL survey has a minimum value of 0 and a maximum value of 100, with a higher score indicating a worse outcome.

    Time frame: 3 months

  11. General health related QOL

    General health related QOL using the Short Form Health Survey (SF-36). The SF-36 has a minimum value of 0 and a maximum value of 100 per health domain, with a higher score indicating a better outcome.

    Time frame: 3 months

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 12, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06452342
Lead sponsor
University Health Network, Toronto
Collaborators
Canadian Venous Thromboembolism Clinical Trials and Outcomes Research (CanVECTOR) Network
Responsible party
Jameel Abdulrehman (Staff Hematologist, University Health Network, Toronto) — Principal investigator
First posted
Jun 11, 2024
Start date
Jun 2024 (estimated)
Primary completion
Apr 2026 (estimated)
Completion
Apr 2026 (estimated)
Last update
Jun 12, 2024

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in Jun 2024. You cannot join it, but the record below documents what was studied.

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