30 seeds Hyssopus officinalis.
Hyssopus officinalis or hyssop is a herbaceous plant of the genus Hyssopus native to Southern Europe, the Middle East, and the region surrounding the Caspian Sea. Due to its properties as an antiseptic, cough reliever, and expectorant, it is commonly used as an aromatic herb and medicinal plant.
As a medicinal herb, hyssop has soothing, expectorant, and cough suppressant properties. The plant also includes the chemicals thujone and phenol, which give it antiseptic properties. Its high concentrations of thujone and chemicals that stimulate the central nervous system can provoke epileptic reactions when taken in high enough doses. The oil of hyssop can cause seizures and even low doses (2–3 drops) can cause convulsions in children.
It has been also used in the formulation of eye drops and mouthwash. Herb hyssop has also been observed to stimulate the gastrointestinal system.