Furosemide Tablets adverse reactions (harm) mainly may cause water and electrolyte disorders, allergy, tinnitus, dizziness and headache. Furosemide tablets are used in edematous disorders, hypertension, prevention of acute renal failure, hyperkalemia and hypercalcemia, dilutional hyponatremia especially when the blood sodium concentration is less than 120 mmol/L, antidiuretic hormone hypersecretion, and acute drug toxicity such as barbiturate poisoning. The hazards produced by furosemide tablets can include water and electrolyte disorders such as postural hypotension, shock, hypokalemia, allergy, blurred vision, xanthopia, photosensitivity, dizziness, headache, nausea, vomiting, abdominal pain, diarrhea, pancreatitis, and muscular ankylosis. It can also lead to bone marrow suppression leading to granulocytopenia, thrombocytopenic purpura and aplastic anemia, hepatic function impairment, abnormal finger (toe) sensation, hyperglycemia, positive urinary glucose, aggravation of pre-existing diabetes mellitus, hyperuricemia, tinnitus, and can also cause renal calculi and aggravate idiopathic edema. Contraindications are mainly allergic to this product, as well as sulfonamides, thiazide diuretics, and pregnant women within the third trimester of pregnancy are prohibited. Taking furosemide needs to be used under the guidance of a professional clinician, do not use the drug blindly.