Evening primrose oil clinical trials
How each study uses evening primrose oil is sorted by a rule, right about nine times in ten. Readers can ask us to read every study one by one.Ask us to read each study
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Example · made-up studies
Breast cancer · Recruiting: 2 came in, 3 changed
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A study of drug A after surgery for early breast cancer
Came in · now Recruiting
Drug B with hormone therapy in advanced breast cancer
Changed
· Sites: 4 added, including Seoul and Busan
· Enrollment: 300 → 450 participants
Exercise during chemotherapy
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Approvals
The first approval found in each region, with its record
- United States
- Not in FDA's approval records
- European Union
- Not in EMA's list of EU-wide authorisations
From FDA's Drugs@FDA and Purple Book (through openFDA) and the European Medicines Agency, files of Sept 2026 and 27 Oct 2026. National approvals in Europe and other countries are not included. How this is worked out
How studies write it
Studies that test it under each name
Studies by the year they started
6 studies that test it; most in 2019 (2)
| Year | Studies |
|---|---|
| 2008 | 1 |
| 2009 | 1 |
| 2018 | 1 |
| 2019 | 2 |
| 2024 | 1 |
By phase
A phase 1/2 study counts in both.
What it is tested for
Each study’s main condition, where its own words name it, so a study counts once.
Who runs them
Industry 1 · Other 5
Assiut University (2) · Medical College and Hospital Kolkata (1) · Max Zeller Soehne AG (1) · St. Luke's Hospital, Pennsylvania (1) · Ain Shams University (1)
Often tested with
Tested in the same studies.
Related medicines
As reviewed, each with the page that says it.
Studies
Open first, then newest update. How each study uses evening primrose oil is read from its arms, and is right about nine times in ten. Ask us to read each study. These are the studies that list it as an intervention; a search of ClinicalTrials.gov also finds studies that mention it only in a description, such as earlier treatment.
Testing it · 6
- Effectiveness of Evening Primrose Oil for Induction of LaborNot yet recruitingEarly Phase 1Assiut UniversityNCT06539975Written as Evening Primrose Oil 1000 MG
- Evening Primrose Oil to Misoprostol During Induction of Second-trimester Missed MiscarriageCompletedPhase 4Assiut UniversityNCT03584698Written as Evening Primrose Oil 1000 MG
- RCT of Evening Primrose Oil for the Treatment of Breastfeeding PainStatus unknownNot applicableSt. Luke's Hospital, PennsylvaniaNCT03876899Written as Evening Primrose Oil
- Evening Primrose Oil Efficacy in Second Trimester AbortionStatus unknownPhase 3Ain Shams UniversityNCT03698734Written as Evening primrose oil(EPO)
- Effects of Tamoxifen in Premenopausal Women With Benign Breast Disease Not at High-Risk of Developing Breast CancerCompletedPhase 4Medical College and Hospital KolkataNCT00999921Written as Evening Primrose Oil
- Investigation of Efficacy and Safety of EPOGAMCompletedPhase 4Max Zeller Soehne AGNCT00878670Written as EPOGAM 1000
Codes
What other systems call evening primrose oil · ClinicalTrials.gg INT002875
- MeSH (NLM) C028498evening primrose oilConfirmed ClinicalTrials.gov, NLM
- UNII (FDA) 3Q9L08K71NEVENING PRIMROSE OILConfirmed FDA, NLM
- RxNorm 203219One source FDA
- NCI Thesaurus C72199Evening Primrose OilOne source FDA
| System | Code | Name there | Checked by |
|---|---|---|---|
| MeSH (NLM) | C028498 | evening primrose oil | Confirmed ClinicalTrials.gov, NLM |
| UNII (FDA) | 3Q9L08K71N | EVENING PRIMROSE OIL | Confirmed FDA, NLM |
| RxNorm | 203219 | — | One source FDA |
| NCI Thesaurus | C72199 | Evening Primrose Oil | One source FDA |
“Confirmed” means two independent publishers link the code to this drug; “one source”, one does and its name agrees.