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Phytomedicine. 2017 Jan 15;24:141-147. doi: 10.1016/j.phymed.2016.12.003. Epub 2016 Dec 12.

Effects of a standardised extract of Trifolium pratense (Promensil) at a dosage of 80mg in the treatment of menopausal hot flushes: A systematic review and meta-analysis.

Author information

1
NatMed-Research Unit, Division of Research, Southern Cross University, Military Rd., Lismore, NSW 2480, Australia. Electronic address: stephen.myers@scu.edu.au.
2
NatMed-Research Unit, Division of Research, Southern Cross University, Military Rd., Lismore, NSW 2480, Australia.

Abstract

OBJECTIVE:

To critically assess the evidence for a specific standardised extract of Trifolium pratense isoflavones (Promensil) at a dosage of 80mg/day in the treatment of menopausal hot flushes.

DATA SOURCES:

Systematic literature searches were performed in Medline, Scopus, CINAHL Plus, Cochrane, AMED and InforRMIT and citations obtained from 1996 to March 2016. Reference lists were checked; corresponding authors contacted and the grey literature searched for additional publications.

REVIEW METHODS:

Studies were selected according to predefined inclusion and exclusion criteria. All randomised clinical trials of a specific standardised extract of Trifolium pratense isoflavones (Promensil) used as a mono-component at 80mg/day and measuring vasomotor symptoms were included. The data extraction and quality assessment were performed independently by one reviewer and validated by a second with any disagreements being settled by discussion. Weighted mean differences and 95% confidence intervals were calculated for continuous data using the fixed-effects model.

RESULTS:

Twenty potentially relevant papers were identified, with only five studies meeting the inclusion criteria. The meta-analysis demonstrated a statistical and clinically relevant reduction in hot flush frequency in the active treatment group compared to placebo. Weighted mean difference 3.63 hot flushes per day: [95% CI 2.70-4.56]; p˂0.00001). Due to a lack of homogeneity a priori defined sub-group analyses were performed demonstrating a substantive difference between cross-over and parallel-arm clinical trial designs.

CONCLUSION:

There is evidence for a statistical and clinically significant benefit for using a specific standardised extract of red clover isoflavones (Promensil) at 80mg/day for treating hot flushes in menopausal women across the 3 studies included in the meta-analysis. The preparation was safe over the short-term duration of the studies (3 months).

KEYWORDS:

Hot flushes; Isoflavones; Menopause; Red clover; Standardisation; Trifolium pratense

PMID:
28160855
DOI:
10.1016/j.phymed.2016.12.003
[Indexed for MEDLINE]
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