1. First of all, we should know what is included in the thyroid series, also called thyroid function? The thyroid function includes T3, T4 and TSH. T3,T4 and TSH are inversely related, that is to say, if T3,T4 is lowered in the body, TSH will be higher; if T3,T4 is higher in the body, TSH will be lowered; when T3,T4 is within the normal range, but TSH is mildly elevated, we call it subclinical hypothyroidism. When subclinical hypothyroidism occurs, you can take Eugenol orally once a quarter to half a tablet, once a day in the morning on an empty stomach. The goal is to maintain the thyroid series within the normal range of values. 2. When a patient with thyroiditis has lower T3,T4 and higher TSH, you can take Eugenol orally. The oral dose is related to the degree of T3 and T4 reduction and TSH elevation. Usually between half and 2 tablets of Eugenol are taken. The goal is to maintain the thyroid series within normal values. And as thyroiditis worsens or decreases, the dose of Eugenol will increase or decrease accordingly. For patients with thyroid cancer who have had one lobe of the gland surgically removed, the oral dose of Eugenol is between 1 and 1.5 tablets. For thyroid cancer patients with total thyroid gland removal, take between 2 and 4 tablets of Eugenol orally. For young people, suppress TSH below normal values as much as possible. For elderly people, suppress TSH at the low limit of normal value as much as possible. 4. For the above mentioned patients taking Eugenol, the review time is usually every 2 weeks to a month when you first start taking it, and once every 3 months after the condition is stable, and once every 3-6 months for long-term stable patients. For patients with nodular goiter with normal thyroid function, it is not recommended to take Eugenol because the inhibitory effect on nodules is not obvious. 6, the dose of eugenol is related to the temperature of people’s living environment, the patient’s activity, and the amount of oxygen consumption. Because thyroxine is related to the body’s functional metabolism, so when the metabolism is high or the patient’s weight is high, naturally the dose of eugenol is needed. Therefore, it is necessary to review the thyroid series regularly and adjust the dose of Eugenol according to the results of the thyroid series at any time. This is because the level of thyroxine in our body will change. 7. Euthyroxine is actually levothyroxine sodium imported from Germany, so when Euthyroxine is not available, it can be replaced by the following drugs, whether domestic or imported, as long as the drug name is the same. This includes Raitis, Zenin, and Gahan. The dosage is the same as that of Eugenol. But look at the dosage specifications of each drug. 8, eugenol the most important side effects. One is a certain effect on the heart, may lead to resting tachycardia, palpitations, arrhythmia, myocardial ischemia, angina pectoris, etc.; the other is to cause osteoporosis. Therefore, long-term high-dose oral eugenol needs to pay attention to heart protection at the same time can be appropriate to take calcium tablets + vitamin D.