Eugenol generally refers to levothyroxine sodium tablets. Patients who need to take levothyroxine sodium tablets are generally suffering from hypothyroidism, patients with hypothyroidism with edema are suitable to eat potassium-excreting diuretic drugs combined with potassium-preserving diuretic drugs for treatment, and it is recommended to follow the doctor’s instructions. Diuretic drugs are a class of drugs that can promote the body’s electrolyte and water discharge and increase the amount of urine, can be used for the treatment of edema disease, hypertension and so on. The adverse effects of diuretics are water electrolyte disorders and may also directly damage the kidneys. Patients with hypothyroidism may have the symptom of edema, when hypothyroidism with edema can take diuretic drugs for treatment, but because diuretic drugs are prone to cause adverse reactions of water electrolyte disorders, so it is suitable to take potassium-excreting diuretic combined with potassium-preserving diuretic drugs for treatment. Among them, potassium-preserving diuretics include spironolactone, aminopterin, etc.; potassium-excluding diuretics include furosemide, hydrochlorothiazide, etc. Commonly used potassium-excreting diuretics combined with potassium-preserving diuretics are generally furosemide and spironolactone, which can not only avoid water-electrolyte disorders, but also can play a diuretic to improve the purpose of edema. Patients who need to use diuretic drug treatment should be under the guidance of the doctor to use drugs, should not be blindly treated on their own.