Levothyroxine (synthroid)

Levothyroxine is an oral medicine used to treat hypothyroidism, goiter or hormone replacement after thyroid removal due to thyroid cancer.

Levothyroxine can be purchased in pharmacies in the form of tablets, under the trade names Synthroid, Euthyrox or Puran T-4.

Levothyroxine Price

The price of Levothyroxine varies between 3 and 13 reais.

Levothyroxine Indications

Levothyroxine is indicated for the treatment of hypothyroidism, that is, when there is low production of hormones by the thyroid, which can happen in the case of goiter, thyroid nodules, subacute or chronic lymphocytic thyroiditis and malignant thyroid tumors.

How to use Levothyroxine

The method of using Levothyroxine should be indicated by the doctor, as the dose of Levothyroxine varies according to the degree of hypothyroidism and the age of the patient. However, it is necessary to take 1 tablet a day, fasting, every morning. You should wait about 20 minutes after taking this medicine to have breakfast.

Side effects of Levothyroxine

Side effects of Levothyroxine include hyperthyroidism, increased heart rate, palpitations, cardiac arrhythmias, chest pain, headache, nervousness, excitability, insomnia, tremors, weakness, cramps, excessive sweating, sudden feeling of heat, fever, loss of weight, menstrual irregularities, diarrhea, vomiting and skin rashes with hives.

Levothyroxine contraindications

Levothyroxine is contraindicated in patients with hypersensitivity to the formula's components, recent myocardial infarction, untreated thyrotoxicosis, decompensated adrenal insufficiency and untreated hyperthyroidism.

Levothyroxine use in pregnancy, breastfeeding and in patients with heart disease, cardiovascular disease, high blood pressure, adrenal gland failure, lack of appetite, tuberculosis, asthma or diabetes should only be done under medical advice, because the dose may have to be reduced.