Eugenol is commonly known as Levothyroxine Sodium Tablets. Levothyroxine Sodium Tablets may reduce the hypoglycemic effect of glucose-lowering medications, and therefore, taking Levothyroxine Sodium Tablets in patients with diabetes mellitus may affect blood sugar. Levothyroxine Sodium Tablet is commonly used in the replacement therapy of hypothyroidism. Taking too much Levothyroxine Sodium Tablet can lead to an increase in thyroid hormones in the body, causing symptoms of hyperthyroidism, such as tachycardia, angina pectoris, and headache. When taking Levothyroxine Sodium Tablet for diabetic patients, the patient’s blood sugar level should be tested frequently when starting treatment, and the dosage of the hypoglycemic medication should be adjusted as prescribed by the doctor if needed. Discomfort symptoms after taking levothyroxine sodium tablets should go to the hospital in time, under the guidance of the doctor for regular treatment.