Merhaba Misafir

A double-blind, placebo-controlled trial of Fennel (Foeniculum vulgare) on menopausal symptoms: A high placebo response


Objective: The present study aimed to evaluate the effects of oral fennel on menopausal symptoms. Material and Methods: This double-blind, randomized, placebo-controlled trial was conducted on 50 postmenopausal women in Mashhad (Iran). Patients were randomly divided into two groups of fennel (n=25) and placebo (n=25). Measurements were performed at baseline and after three months using the Menopause-Specific Quality of Life questionnaire. Results: Both placebo and treatment groups revealed significant improvements in the hot flush score (p<0.001 for fennel and p<0.01 for placebo), night sweats (p=0.007 for fennel and p<0.01 for placebo), sweating (p=0.002 for fennel and p<0.01 for placebo), symptoms of anxiety (p=0.05 for fennel and p=0.001 for placebo), feeling depressed (p<0.01 for fennel and p=0.006 for placebo), and impatience with other people (p<0.01 for fennel and p=0.003 for placebo). There were no significant differences in any menopausal symptoms between the fennel and placebo groups, except for coughing and sneezing when urinating (p=0.03). Conclusion: The failure to indicate a significant effect may have been caused by a high placebo response. It is suggested that future trials should include a placebo run-in phase or design a sequential, parallel study with larger sample sizes to mitigate the placebo effect. (J Turk Ger Gynecol Assoc 2018; 19: 122-7)

Yayınlandığı Kaynak : Journal of the Turkish-German Gynecological Association
  • Yıl : 2018
  • DOI : 10.4274/jtgga.2017.0124
  • Cilt : 19
  • ISSN : 1309-0399
  • Sayı : 3
  • eISSN : 1309-0380
  • Sayfa Aralığı : 122-127
  • IO Kayıt No : 76552
  • Yayıncı : Turkish-German Gynecological Association