The efficacy and function of Sodium Chloride Injection is to treat various causes of dehydration, hypochloremic metabolic alkalosis, etc.; contraindications include patients with gestational hypertension syndrome, drug allergy and so on. Sodium chloride injection is similar in nature to normal extracellular fluid, which can replenish body fluids and maintain the normal physiological function of the body, and can be used for the treatment of dehydration due to various causes, hypochlorhydria metabolic alkalosis, hypertonic non-ketotic diabetic coma, and external wound flushing. The drug is contraindicated in patients with hypertensive syndrome of pregnancy; contraindicated in patients with drug allergy; contraindicated when the drug has changed in character or when there is a foreign body in the bottle. In addition, it should be used with caution in the following cases: hypokalemia; hypertension; edematous diseases such as cirrhosis, nephrotic syndrome, cerebral edema, congestive heart failure, ascites, acute left heart failure; renal insufficiency with intractable decrease in urinary output; oliguric stage of acute renal failure. The drug can have adverse reactions such as edema, accelerated heart rate, chest tightness, increased blood pressure, cerebral edema, dyspnea, hemolysis, and acute left heart failure, mostly caused by delivering too much too fast. If you need to use the drug patients, please be sure to take the drug under the guidance of a doctor in strict compliance with the doctor’s instructions, do not self-administer the drug at will.