CLOVE slow blood clotting especially when taken with other medications. This increases the chances of bruising and bleeding. Clove contains eugenol the portion of the clove that is responsible for slowing down blood clotting. Clove oil (Eugenol) can be used for acute tooth pain; cloves can be used to freshen breath; cloves can be used as a carminative; cloves can increase stomach hydrochloric acid; cloves can improve peristalsis; cloves are also said to be a natural anthelmintic.