White horehound is mostly used as a herbal tea. When making a tea a ½-1 teaspoon of the dried herb can be used in one cup of boiling water and soak for 10-15 minutes before it is strained.
The daily dosage often recommended by herbalist to reduce a sore throat and loosen phlegm is one cup three times a day and this corresponds to an intake of approximately 4.5 g of dried herb.
More demanding applications require higher concentrations and should be then used less frequently.
When the herb is used in tincture form the recommended dosages are often 2.1 ml per day of a 1: 5 tincture in 40% alcohol.
For all commercial products containing white horehound, the manufacturer’s instructions should be followed.
Potential Side Effects of White Horehound
Studies suggest that the usage of white horehound over an extended period of time may lead to high blood pressure. This plant should only be taken as needed and not on a regular basis.
In large doses, the herb may cause irregular heartbeat so people with heart problems should consult a professional health care provider prior to use.
The fresh plant has been known to cause skin rash in sensitive people. Dust from the dried herb can irritate the airways, so it might be a good idea to use a face-mask when processing the plant.
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