Hyssop is a good expectorant and antiviral herb commonly used to treat respiratory conditions such as influenza, sinus infections, colds, asthma and bronchitis. Most of its medicinal properties are attributed to the essential oil of hyssop.
The infusion or decoction is being used to bring relief for the symptoms of lung and upper respiratory problems.
Hyssop is an antispasmodic, sweat-inducing and an expectorant (helps with the coughing up of mucus, it can also bring relief in these conditions by preparing a poultice that is placed directly on the chest or through applying of Hyssop-oil containing ointment.
Hyssop leaves and green stems contain many bioactive compounds like rosmarinic and caffeic acids along with pinanones, beta-pinene, limonene, pinocamphone, and isopinocamphone, tannin, glycosides (diosmine), flavonoids, and marrubin.
As a peripheral vasodilator, it is also diaphoretic (induces sweating) and has anti-inflammatory properties.