You should take Eugenol on an empty stomach in the morning, at least half an hour before meals. 2. You should not increase or decrease the dosage without permission, and you should not stop taking the medication without permission. 3. You should avoid grapefruit juice and soy products during the medication period. The medication should be checked regularly for serum thyroxine levels. 5. Because of possible interactions with various medications, you must inform your doctor if you are using other medications at the same time. 6. If side effects such as palpitations, headache, or fever occur during the medication, you should review the medication at any time.