evening primrose oil

  • Pharmacy Author:
    Omudhome Ogbru, PharmD

    Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

  • Medical and Pharmacy Editor: Charles Patrick Davis, MD, PhD
    Charles Patrick Davis, MD, PhD

    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

What brand names are available for evening primrose oil-oral?

Evening primrose oil, Common Evening Primrose, Fever plant, Sun drops

Is evening primrose oil-oral available as a generic drug?


Do I need a prescription for evening primrose oil-oral?


What are the side effects of evening primrose oil-oral?

Side effects of Oenothera include:

Other side effects include:

  • increase bruising,
  • bleeding, and
  • seizures.

What is the dosage for evening primrose oil-oral?

(dosing recommmendations may vary with supplier):

Which drugs or supplements interact with evening primrose oil-oral?

Oenothera should be used with caution with medications that increase bruising and bleeding risks. Medications like aspirin, celecoxib (Celebrex), ibuprofen (Motrin), diclofenac (Voltaren), meloxicam (Mobic), naproxen (Aleve, Naprosyn), warfarin (Coumadin), enoxaparin (Lovenox), and clopidogrel (Plavix) should be used with caution with Oenothera.

Is evening primrose oil-oral safe to take if I'm pregnant or breastfeeding?

There are no adequate studies of Oenothera use by pregnant women to determine its safety during pregnancy. It should be avoided by pregnant women.

It is not known whether Oenothera enters breast milk.

What else should I know about evening primrose oil-oral?

What preparations of evening primrose oil-oral are available?

Oenothera is available in capsules, softgels, and liquid extract forms. Concentration of Oenothera may vary from product-to-product due to multiple manufacturers producing various products.

How should I keep evening primrose oil-oral stored?

Because multiple manufacturers make different forms of Oenothera, storage requirements may vary based on individual manufacturer practices.


Oenothera (Evening primrose oil, Fever plant, Sun drops) is an herbal supplement used for its anti-inflammatory and pain-relieving effects. Side effects, drug interactions, dosage, storage, and safety information should be reviewed prior to taking this supplement.

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REFERENCE: Oenothera – Medscape

Evening Primrose Oil. Medline Plus