Primary hypothyroidism is generally treated with oral levothyroxine tablets, which are used to replenish the lack of thyroid hormones in the body and restore the thyroid function to a more normal state. If hypothyroid patients take too much thyroxine tablets, it will also lead to an increase in the level of thyroid hormones in the body, which will instead become hyperthyroidism, resulting in panic attacks, fear of heat, excessive sweating, weight loss, hand tremors and other symptoms of high thyroid hormone metabolism. This is mainly due to drug hyperthyroidism, which occurs when the thyroid function is not monitored regularly and the dosage of medication is adjusted in a timely manner, resulting in drug overdose. In this case, you should continue to reduce the dosage of levothyroxine tablets in time, and the thyroid function will gradually return to normal.