Hyssop

The Essentials

Aromatic chest herb with documented expectorant (helps loosen mucus so you can cough it up) activity.

Mentioned in Avicenna's Canon and the Old Testament alike.

Strong tea with honey is the classical winter cough remedy.

Concentrated essential oil (the concentrated aromatic oil of the plant) isn't safe for internal use — stay with the herb.

Known to botanists as Hyssopus officinalis.