Tolvaptan tablets specific how long to take the effect, mainly according to the severity of the disease to make clear, generally less severe symptoms of 3 to 7 days to see the effect, the more serious symptoms for 3 to 6 months effective. Tolvaptan tablets are used to treat clinically significant high volume and normal volume hyponatremia. It is also used for fluid retention due to heart failure where treatment with other diuretics, such as labeled diuretics, is unsatisfactory. May be used in combination with other diuretics. 1. Mild disease: tolvaptan tablets belong to a kind of diuretic, the effect of diuretic is much larger than the effect of sodium, mainly treating the more obvious high volume or normal volume hyponatremia. Generally, if the condition is mild, it can be effective or cured in 3~7 days. 2. Severe disease: treating relatively serious disease, such as antidiuretic hormone secretion abnormality syndrome, lung cancer carcinoid syndrome, anticoagulant hormone secretion abnormality, liver cirrhosis and heart failure and other diseases. Treatment is generally long, taking 3 to 6 months or even longer. It can cause adverse reactions including thirst, dry mouth, fatigue, constipation, frequent or excessive urination and hyperglycemia. Note that it is contraindicated in patients with a history of hypersensitivity to any of the components of the product or similar compounds, patients with anuria, and low-volume hyponatremia. Tolvaptan tablets need to be consumed first in small doses and not in sudden large doses to avoid adverse reactions. This drug must be taken under the guidance of a doctor, and at the same time combined with the results of laboratory tests to clarify the condition of recovery.