What are the side effects of levothyroxine sodium tablets for hypothyroidism?

Patients with hypothyroidism taking levothyroxine sodium tablets may commonly experience symptoms such as headache, anxiety, insomnia, excessive sweating, flushing, and weight loss. These symptoms typically resolve gradually within several days after dose reduction or discontinuation of the medication. Special caution is advised for elderly patients and those with coronary artery atherosclerotic heart disease, heart failure, or tachycardia; such patients should take this medication only under the guidance of a physician. Self-medication is strictly prohibited.