The generic name of Eugenol is Levothyroxine Sodium Tablets. Soreness in the calves and stomach after treatment with levothyroxine sodium tablets in patients with hypothyroidism is not necessarily a calcium deficiency. Patients with hypothyroidism need to take levothyroxine sodium tablets for treatment as prescribed by the doctor, and if the dose of the drug is too high, the symptoms of hyperthyroidism may occur, and hyperthyroidism may cause spasm of the skeletal muscles, which in turn causes the symptoms of soreness in the calves. At the same time, the lack of calcium in the organism may also cause symptoms such as tingling and soreness in the muscles of the lower limbs. In addition, sore calf tummies may also be caused by physiological factors such as prolonged standing or sudden exercise after a long period of inactivity, as well as disease factors such as lower extremity blood circulation disorders and varicose veins. Patients with hypothyroidism who experience soreness in the calves are advised to go to the hospital after eliminating physiological factors.