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Part of the plant used: roots and rhizomes
Valerian is a perennial plant indigenous to Europe and North America. It contains valepotriate and valerenic acid, substances exclusive to valerian, which are thought to be responsible for its medicinal properties. Most standardized products contain only valerenic acid (0.8% extracts), but products vary widely and are not uniform in content.
Standardized extract (0,8 to 1% of valeric acid) - 400 to 900 mg ½ to 2 hours before bedtime
Tea - 2 to 3 grams root per cup, in the evening
Tincture - 4 to 6 mL, in the evening
Standardized extract (0,8 to 1% of valeric acid) - 200 to 400 mg per dose 3 or 4 divided doses
Tea - 2 to 3 grams root per cup, one or several times a day
Tincture - 1 to 3 mL, one or several times a day
There is insufficient reliable information to conclude that kava is effective in any other indication.
In 2004, Canada adopted new regulations that control the manufacturing, packaging, labeling and importing of natural health products. The new regulations also include an adverse reaction reporting system. Products that conform to the regulation's criteria are identified with a natural product number (NPN) and can be legally sold in Canada. This number indicates that the product meets specific criteria for safety and purity, not that it is effective for any indication.
Medicinal plant contents vary naturally from plant to plant - just as fruits from the same package may vary in taste and texture. There is no standard to measure the active content of each plant. Thus, efficacy of natural products should be expected to vary from brand to brand as well as from bottle to bottle of the same brand.
For more information about the Natural Health Products Regulations, or to check if a product has been assessed, visit the Health Canada website at www.hc-sc.gc.ca/dhp-mps/prodnatur/index-eng.php.
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The patient information leaflets are provided by Vigilance Santé Inc. This content is for information purposes only and does not in any manner whatsoever replace the opinion or advice of your health care professional. Always consult a health care professional before making a decision about your medication or treatment.