Hypothyroidism (low thyroid) is a major complication of hyperthyroidism treatment (including surgery and medication), and even one of the natural regressions of hyperthyroidism progression, and other causes (such as post-partum thyroiditis, Hashimoto’s thyroiditis, etc.) may also lead to low thyroid. Therefore, it is very important to correctly recognize and promptly deal with hypothyroidism. The main physiological function of the thyroid gland is to produce thyroid hormones. The so-called “hypothyroidism” is a series of syndromes that occur when the thyroid tissue does not produce enough thyroid hormones for the body to use. Maybe you have a preliminary understanding of the signs and symptoms of hypothyroidism after reading my article, but you still don’t know what to do about the treatment; maybe you are worried because of the simple answer of some doctors, “You’re hopeless, you need to take medication for the rest of your life! Maybe you are now deeply afraid because some ignorant people told you that “Iodine-131 kills all the cells in your body” ……. So, is hypothyroidism really scary? In fact, as long as you understand the treatment process of hypothyroidism, you will be able to face it openly, because a reasonable and appropriate amount of thyroxine supplementation can eliminate the symptoms of hypothyroidism and obtain a normal quality of life, and there are no side effects. As long as your thyroid function is normal, you are a normal person, and you can get pregnant and breastfeed while taking the medication! The majority of hypothyroidism caused by iodine-131 treatment is temporary and can be stopped after taking thyroxine tablets for a period of time; a small number of patients have permanent hypothyroidism, which means that they have to take thyroxine tablets for a lifetime for replacement therapy. Although the latter may sound overwhelming at first, your concerns will be allayed when you realize that taking thyroxine replacement therapy is as simple as eating, drinking, or taking vitamins and calcium supplements. At present, the price of 100 tablets of commonly used levothyroxine tablets (e.g. Eugenol 50ug) is less than 30 RMB, and generally speaking, the amount of daily supplementation is between half a tablet and 2 tablets, and the total number of tablets per year ranges from 180 tablets to 720 tablets, and the cost per year is only about 200 RMB at most. For the side effects of hyperthyroid medication and the need for regular blood draws to adjust the dosage, taking Levothyroxine Tablet Replacement is such a simple, inexpensive thing to do. Patient: Be glad that you can live a happy and healthy life with just one “tonic tablet” a day! Clinical experience has shown that patients with subclinical or clinical hypothyroidism, early-onset hypothyroidism or late-onset hypothyroidism should be treated with Eugenol replacement therapy, and then the thyroid function should be maintained in the normal range. The dose of thyroxine required by patients with hypothyroidism is related to the degree of hypothyroidism, the enterohepatic circulation of thyroxine, and other factors. 1) Body weight: In patients who are significantly obese, it may be more scientific and practical to calculate on the basis of ideal body weight (1.6ug/kg). 2) Age: Infants and children have a slightly higher requirement than adults (4-5ug/kg body weight), and the dose is reduced in the elderly (>65 years). 3) Sex: the adequate replacement dose for women is slightly smaller than that for men. 4) Season: Cold increases the demand for hormones, while summer is the opposite. (5) Drug interactions: taking estrogen, certain drugs that block drug absorption (cholestyramine, aluminum thiosulfate and ferrous sulfate, etc.) or increase thyroxine clearance (ethylaminolevulinate) should increase the dosage of thyroxine. Hypothyroidism commonly used therapeutic drugs are as follows: 1, dry thyroid tablets: is the use of animal (mainly pigs and cattle thyroid gland as raw materials, our country is mainly pig’s thyroid gland as raw materials) of the thyroid gland roasted, milled into powder, pressed into tablets. Dried thyroid tablets can only be absorbed through the intestinal tract, the potency is not stable enough, the dose of dried thyroid per tablet is 40mg, the daily replacement dose of 40-60mg/day, individual patients need 80-120mg/day. 2, L-type thyroxine tablets (L-thyroxine, L-T4): L-T4 is a synthetic thyroid preparation, stable potency, there are oral tablets and intravenous injection of two kinds of sodium salt for intravenous injection, especially suitable for mucous edema coma patients, oral preparation absorption rate of 50% to 80%, in the plasma half-life of 7 to 8 days, once a day to take. There are three kinds of tablet dosage of the drug, which are 20mg/each tablet, 50mg/each tablet and 100mg/each tablet. At present, the domestic has been able to produce tablets. 3.Triiodothyronine (Liothyronine-T3): T3 is also a synthetic thyroid hormone preparation, stable potency, only oral preparation, half-life in plasma is 24 hours, a day’s dose needs to be divided into doses or taken once. Due to more T3 receptors in cardiomyocytes, the cardiovascular effect of the patient’s cardiovascular to T3 after taking the drug is too strong, which can induce angina, myocardial infarction and heart failure, and the risk to elderly patients and cardiovascular patients is high, and it is rarely used in the clinic.