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Painkiller-blood thinner combo under scrutiny in cancer patients

NCT ID NCT07384013

Knowledge-focused Sponsor: Rambam Health Care Campus Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at how metamizole (Optalgin), a common painkiller, changes the levels of blood thinners (apixaban or rivaroxaban) in cancer patients. Researchers will measure drug concentrations at several time points in 30 adults. The goal is to understand if metamizole interferes with these anticoagulants, which could affect bleeding or clotting risks.

What this could mean

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

Active substance
metamizole (Optalgin)
What this could lead to
If successful, this could help doctors safely combine metamizole with blood thinners in cancer patients, reducing bleeding or clotting risks.
What could go wrong
This is a small, early-stage observational study with only 30 participants, so results may not apply broadly. It does not test a new treatment, only measures drug interactions.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 30 people

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

Started

Nov 2025

Expected to finish

Dec 2027

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: * Adult oncology patients (≥18 years old). * Receiving apixaban or rivaroxaban for anticoagulation. * New/current metamizole users taking at least 1g TID for pain management. * Platelets ≥100×10⁹/L * ECOG PS\<3 * Provided informed consent Exclusion Criteria: * History of allergic reaction to metamizole or DOACs. * Individuals with significant gastrointestinal disorders that may affect absorption, including (but not limited to) diagnosed bowel obstruction, persistent diarrhea, or the presence of a nasogastric tube (NGT/zonda)

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Conditions

The condition(s) this trial relates to.

agnosia blood coagulation disease cancer neoplasm vascular hemostatic disease

As listed by the trial registrant

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

Coagulation defect Oncologic diseases Pain management

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Rambam Health Care Campus

    RECRUITING

    Haifa, 31096, Israel

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