Eugenol is levothyroxine sodium, pregnant women can take levothyroxine sodium if their thyroid hormone levels are low during pregnancy, and pay attention to regular rechecks of thyroid function in order to adjust the dose of the drug in time. Levothyroxine sodium is mainly used to treat hypothyroidism. If a woman develops hypothyroidism while preparing for or during pregnancy, she should take levothyroxine sodium to maintain normal thyroid hormone levels. At the recommended therapeutic dose, there are no significant adverse effects on pregnant women or fetuses when taking Levothyroxine Sodium. Contraindications to the drug include hypersensitivity to the drug, tachyarrhythmias, non-hypothyroid heart failure, and recent myocardial infarction. Adverse reactions include angina pectoris, arrhythmia, palpitations, tremor, euphoria, headache, restlessness, insomnia, diarrhea, vomiting, excessive sweating, flushing, weight loss, spasm of skeletal muscles. It should be noted that the drug should be used under the guidance of a doctor, pay attention to regular review of thyroid function, timely adjustment of drug dosage.