* Allergic reactions to clove and eugenol have been reported.
* [[Eugenol]] can be potentially dangerous when ingested in higher amounts. It is hepatotoxic and can have several dangerous side-effects.
* When using Clove Bud Oil, there is moderate risk for mucous membrane irritation, may inhibit blood clotting and pose a drug interaction hazard. It may cause embryotoxicity. There is a moderate risk of skin sensitization, and Tisserand and Young recommend a dermal maximum of 0.5%. They advise not to use topically on children age 2 or younger. Reading Tisserand and Young's full profile is recommended.
*Clove supplements should be avoided in children and pregnant or nursing women.