Eugenol requires to be taken orally half an hour before a meal, and you can start eating breakfast half an hour after taking Eugenol, because some foods or drugs may affect the absorption of Eugenol, such as milk, soy milk and other protein-rich foods, so it is required to take Eugenol orally half an hour before a meal. It is recommended to take Eugenol orally in the morning after waking up and then eat breakfast, so that Eugenol can be better absorbed in the gastrointestinal tract and achieve a more stable treatment effect. It is recommended to review thyroid function every four weeks after taking Eugenol treatment, because Eugenol basically reaches a more stable drug concentration in the body in about four weeks, so that the thyroid function can reflect whether the drug dose is appropriate.