Traditional Uses: Traditionally used in European folk medicine since the Middle Ages as a diaphoretic (sweat-inducing) tea to treat feverish colds and flu, as a calming nervine for anxiety, restlessness, and insomnia, and as an expectorant for coughs, throat irritation, and upper respiratory catarrh.
Potential Benefits: May help reduce anxiety and promote calmness (anxiolytic effect), relieve cold and flu symptoms by inducing sweating, soothe respiratory tract irritation, and exhibit mild hypotensive and antispasmodic properties, though most evidence is derived from traditional use and limited animal studies.
Warnings: Avoid during pregnancy and breastfeeding due to a lack of safety data; frequent or high doses have been associated with potential cardiac damage (use caution with heart disease); possible allergic reactions or contact dermatitis; and may interact with lithium and sedative medications.
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