Is clove essential oil safe to swallow?

No. Clove essential oil is highly concentrated and can cause severe poisoning, especially in children.

Unopened clove flower buds and dried whole cloves — Whole culinary cloves and concentrated clove oil require different safety rules.

The short answer

Do not swallow clove essential oil. Large eugenol exposures have been associated with seizures, coma and severe liver or kidney injury. Keep oils secured away from children and contact poison-control or emergency services for a suspected ingestion.