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Metamizole

Phase 3

Cancer Pain | Small molecule | Oncology |Pulmonx Corporation|Last Updated: Aug 19, 2026

Target and mechanism

Molecular targetPTGS2, PTGS1
Target classInhibitor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials1
Total Enrollment318

FDA Designations

No designations recorded

Clinical trial landscape

Metamizole · 1 trial · 2 indications

Phase 3 1
NCT07682558Efficacy of Non-opioid Drugs in Addition to Opioid Therapy for Cancer Pain ManagementCancer Pain
NOT YET_RECRUITING318 Analytics
PHASE3NOT YET_RECRUITING
Efficacy of Non-opioid Drugs in Addition to Opioid Therapy for Cancer Pain Management
Cancer PainUnlock trial analytics

Study Endpoints

Primary Endpoints

Change in cancer pain
up to 5 days

The primary outcome will help to determine whether adding metamizole (dipyrone) or ibuprofen to opioids is more effective than adding placebo in reducing average daily pain intensity (primary outcome) in cancer patients. \- Average of 5-day average daily patient reported pain assessed on days 3 to 7 by numeric rating scale (NRS); The NRS ranges from 0 ("no pain") to 10 ("pain as bad as the patient can imagine")

Secondary Endpoints

Assessment of equivalence of metamizole and ibuprofen in analgesic potency regarding the pain intensity
up to 5 days
Worst pain in the past 24 hours by NRS
up to 8 days
Least pain in the past 24 hours by NRS
up to 8 days
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Opioid + MetamizoleEXPERIMENTAL -
Opioid + IbuprofenEXPERIMENTAL -
Opioid + PlaceboPLACEBO_COMPARATOR -

Interventions

NameTypeDescription
MetamizoleDRUGMetamizole 4 g/d as: 2 capsules of 500 mg Metamizole each (1000 mg) taken 4 x daily orally.
IbuprofenDRUGIbuprofen 1.2 g/d as: 2 capsules of 150 mg Ibuprofen each (300 mg) taken 4 x daily orally
PlaceboOTHERPlacebo 0 g/d as: 2 capsules containing inactive substance (mannitol) taken 4 x daily orally.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Inpatient setting (discharge possible, if patient returns for End of Study Visit) * Diagnosis of metastatic or locally advanced cancer * Cancer pain as defined by IASP (International Association for the Study of Pain) * Cancer pain therapy with opioids indicated for pain manag...

Countries:Switzerland
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Competitive Landscape -Cancer Pain 4 trials