Research: ISLAM and CARTER,

Listed in Issue 118

Abstract

ISLAM and CARTER, Family Medicine Department, University of Texas Medical Branch, Galveston, TX 77555-1123, USA, jaislam@utmb.edu, have reviewed (48 references) the use of Echinacea in upper respiratory tract infections. Abstract: Echinacea is an herb widely used for the prevention or treatment of upper respiratory tract infections. This review article examines the mechanism of action, dose, and types of Echinacea used for these purposes. The principal mode of action of Echinacea is through stimulation of the immune system. Most Echinacea studies were done in Germany, but their results are difficult to interpret because of variability of experimental parameters. Types of Echinacea commonly used are Echinacea purpurea, E pallida, and E angustifolia. Both the plant's upper parts and roots are used. Tablets, extracts, fresh pressed juice, teas, and tinctures have been used. Though studies show a beneficial effect, clear conclusions and recommendations of Echinacea use cannot be made due to a lack of standard product, variability in dose, and variability in outcome measures. Therefore, well-designed studies with consistent standardized measures are required.

Background

Methodology

Results

Conclusion

References

Islam J, Carter R. Use of Echinacea in upper respiratory tract infection. Southern Medical Journal 98 (3): 311-318, Mar 2005.

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