* Children: It’s UNSAFE to give hyssop to children. Convulsions were reported in a child who took 2-3 drops of hyssop oil over several days.
* Seizures: If you have a history of having seizures, don’t use hyssop. It might trigger seizures or make them worse.
* [[Eugenol]] can be potentially dangerous when ingested in higher amounts. It is hepatotoxic and can have several dangerous side-effects.
==The benefits of Hyssop are==
Hyssop has been used for cleansing ritual and as medicine since biblical times. Nowadays it is known that the volatile oil and other ingredients that are contained in the leaves and green stems indeed have antibacterial, antiviral and other beneficial properties.