• Pain Manag Nurs · Apr 2024

    Randomized Controlled Trial

    The Effect of St. John's Wort Oil (Hypericum Perforatum L.) in Knee Osteoarthritis: A Randomized Controlled and Qualitative Study.

    • Deniz Zeynep Sönmez and Sultan Taşcı.
    • From the Osmaniye Korkut Ata University Faculty of Health Sciences Midwifery Department, Osmaniye, Turkey. Electronic address: dzeyneps@gmail.com.
    • Pain Manag Nurs. 2024 Apr 1; 25 (2): e115e125e115-e125.

    BackgroundReducing pain and improving physical function are critical in the treatment of osteoarthritis. Although individuals use St. John's Wort oil to relieve pain due to osteoarthritis, no scientific research has been found investigating its effectiveness.AimThis study investigated the effect of St. John's Wort oil on pain intensity and physical functions in people with knee osteoarthritis.MethodsThis study adopted a single-blind, randomized, placebo-controlled, and qualitative mixed design. The sample consisted of 60 patients randomized into intervention (n = 30) and placebo control (n=30) groups. The experimental group participants were treated with topically St. John's Wort oil three times a week for 3 weeks, and the placebo control group participants were treated with olive oil three times a week for 3 weeks. Quantitative data were collected using a patient identification form, the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and the Visual Analogue Scale. Qualitative data were collected through semi-structured interviews.ResultsThe experimental group had a significantly lower mean Visual Analog Scale score in the first, third, and fourth follow-ups than the control group. The experimental group had significantly lower mean WOMAC-pain, WOMAC-stiffness, and WOMAC-physical function subscale scores in the last follow-up than in the first follow-up. The qualitative data agreed with the quantitative data.ConclusionsThe results show that St. John's Wort oil helps people with knee osteoarthritis feel less pain and become physically more active. Additional research is warranted to better understand the effect of St. John's Wort oil on pain intensity and physical functions in people with knee osteoarthritis.Copyright © 2023 American Society for Pain Management Nursing. Published by Elsevier Inc. All rights reserved.

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