For the treatment of insomnia, studies have found that valerian root extract should be taken in doses ranging from 300 to 600 mg daily, equivalent to 2 to 3 grams of dried herbal valerian root soaked in one cup of hot water for 10 to 15 minutes. Valerian works better when taken 30 minutes to two hours before bedtime.^[1]

The European Medicines Agency recommends valerian root to relieve nervous tension, at a dosage of 400–600 mg of valerian extract or 0.3–3 g of powdered valerian root up to 3 times daily.^[2][3]