Although herbal preparations may be...

Although herbal preparations may be useful for a certain quantity of disorders, safety evaluations are limited. Because certain prescribed medications have a narrow therapeutic window, interactions with herbs ne to be assessed. American ginseng, single in kind of the most popular herbs in the United States, is believed to maintain righteous health, fight fatigue, and boost immune function. However, it also has been noted to exalt bleeding in surgical patients, and is reported to shape the efficacy of warfarin. Yuan and associates carried without a randomized, double-blind, placebo-controlled trial using 20 young, healthy presents to clarify the potential interaction between ginseng and warfarin.

Participants were given a 5-mg dose of warfarin onward each of the first three days of the consideration then in the second week were assigned randomly to oral American ginseng (1 g twice through day)or placebo for three weeks. onward the first three days of week 4 participants again were given warfarin. All participants were instructed to maintain a diet consistent in vitamin K

A small however significant reduction in the International Normalized Ratio (INR) was noted in the ginseng cluster from weeks 1 to 4 compared with the change in the placebo assign places to The average daily vitamin K intake, measured by means of diet diaries, did not differ significantly between the sum of two units groups.

The authors deduce that American ginseng reduced the anticoagulant general intent of warfarin by induction of hepatic P450 enzyme arrangement activity and increased warfarin elimination. Because the INR reduction was statistically significant after ginseng intake for sum of two units weeks, it is likely that more than united week of ginseng intake is necessary to induce this metabolic pathway.

RICHARD SADOVSKY, MD

Yuan C et al. American ginseng renders warfarin's effect in healthy patients. Ann Intern M July 62004;141:23-7

EDITOR 'S NOTE: Because use of herbal medications is to such a degree prevalent, physicians need to help their patients understand about of the potential safety issues. Just because these preparations can be purchased without a prescription does not mean that they are risk exempt A review of ginkgo biloba points not at home that it inhibits the platelet-activating factor, making use of this herb with warfarin, aspirin, or any other antiplatelet medication potentially dangerous. (1) Ginkgo intake should be stopped before a patient undergoe any proceeding that might result in significant bleeding. Other herbs taken with ginkgo, so as garlic, feverfew, or ginseng, can increase the bleeding risk. (1) Hypersensitivity to ginkgo is rare, as are side imports though mild nausea, vomiting, diarrhea, headaches, dizziness, and palpitations have been reported. Physicians should make trial of to recommend treatments that are known to be safe and effective, moreover also should support patients who want to attempt herbal preparations safely for reasonable purports and help them monitor their progres with the treatment. (2) The American Botanical Council, a nonprofit research and educational association, put forwards information about herbal preparations onward their Web site, at:http://www.herbalgram.org.--R.S.

REFERENCES

(1) Sierpina V Wollschlaeger B Blumenthal M Ginkgo biloba. Am Fam Physician 2003;68:923-6

(2) Zink T Chaffin J Herbal "health "products: what family physicians ne to know. Am Fam Physician 1998;58:1133-40

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