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Evening Primrose Oil

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Other names:

Oenothera biennis

What it is supposed to do (Actions):

Used in prevention/treatment of breast tenderness (mastalgia) and pre-menstrual syndrome; has been utilized in management of asthma or skin disorders (acne, eczema, psoriasis), gastrointestinal disorders, rheumatoid arthritis, multiple sclerosis, diabetic neuropathy

How it is supposed to work:

Considered to have anti-inflammatory, sedative, anticoagulant and drying effects.

Toxic effects:

Gastro-intestinal disturbances and headaches; insufficient clinical data on safety during pregnancy and lactation; no known drug interactions (but caution suggested in patients taking phenothiazines and other medications that lower the seizure threshold)

Does it work?

Meta-analysis of seven studies found no value in Pre-menstrual Syndrome. Some effectiveness found in studies of rheumatoid arthritis, diabetic neuropathy, and breast tenderness; no studies on asthma; mixed results in treating skin conditions.

References:

  1. DeSmet P. Herbal remedies. New England Journal of Medicine. December 2002;347(25);2046-2056.
     
  2. Gardiner P, Kemper K. Herbs in pediatric and adolescent medicine. Pediatrics in Review. February 2000;21(2):44-57.
 

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Last modified: February 25, 2004