If you feel dizzy and have weakness in your limbs after infusion, the most common cause is infusion reaction. Infusion reaction is a kind of adverse reaction caused by infusion, including fever reaction, usually because the pyrogen, drugs or impurities enter the patient’s body with the infusion, or because the temperature of the infusion is too low, or the concentration of drugs is too high, or because the speed of infusion is too fast, etc. Adverse reactions. In this case, the patient will have dizziness and weakness of the limbs, so symptomatic treatment should be given immediately. After stopping the infusion, the patient should be placed in a flat position, told to eliminate the patient’s nervousness and fear, immediately administer oxygen therapy, take measures to keep the patient warm, and monitor the patient’s ECG, blood pressure, pulse rate and oxygen saturation. If there are abnormalities in vital signs, desensitization and symptomatic treatment should be given immediately.