The dried and cut root is gently boiled in water for about fifteen minutes, then filtered before being consumed warm. This preparation was traditionally reserved for restless evenings, on the advice of an herbalist. Dosage must be validated with a healthcare professional or a recognized pharmacopoeia before use.
Fresh or dried root is macerated for several weeks in alcohol, then filtered to obtain a concentrated tincture. This type of preparation, being more potent, requires professional advice regarding dosage and duration of use. Dosage must be validated with a healthcare professional or a recognized pharmacopoeia before use.
Today it is found primarily in herb shops in the form of dried root or tincture, the plant being rarely present in the wild in Europe and more often cultivated for ornamental or medicinal purposes.
The root is traditionally harvested in autumn, once the aerial part has withered, a period when it is considered richest in active principles.