The generic name of Euthyrox is Levothyroxine Sodium Tablets, and the weakness after taking Levothyroxine Sodium Tablets for total thyroidectomy may be due to an adverse reaction or incorrect dosage of the medication, among other reasons. Levothyroxine Sodium Tablet can be used for the replacement therapy of hypothyroidism after total thyroidectomy, the occurrence of fatigue may be an adverse reaction to the drug, the drug may be adverse reactions include muscle weakness and cramps. Patients are advised to seek prompt medical attention and adjust the dosage of the drug according to the doctor’s advice. In addition to the adverse reactions of Levothyroxine Sodium Tablet, the weakness may also be due to excessive fatigue, malnutrition, or severe anemia, tumors, colds and fevers, etc. You should go to the hospital to find out the cause of the disease and treat it. After taking levothyroxine sodium for total thyroidectomy, you should go to the hospital for treatment under the guidance of a doctor. Do not stop the medication, increase or decrease the dosage of the medication on your own, as this may lead to more serious adverse consequences.