Serious side effects of furaquintinib are severe high blood pressure, bleeding, serious infections, and skin toxicity side effects. 1. Severe hypertension after the use of furaquintinib usually requires the administration of a combination of several antihypertensive drugs such as valsartan and hydrochlorothiazide, and in most cases the blood pressure can be effectively controlled. In most cases, blood pressure can be effectively controlled. Only in rare cases, blood pressure control is unsatisfactory, and it is usually necessary to reduce the dosage of the drug or switch to other drugs. 2. Bleeding side effects caused by Furaquintinib can be manifested as blood in urine, vomiting blood, hemoptysis, nosebleed, etc. Generally, it is necessary to give emergency hemostatic treatment, commonly used in the treatment of sodium cargosulfate, phenol sulfonyl ethylamine. 3. Serious infections in the urinary tract or respiratory system, broad-spectrum antibiotics are given to control the infection, such as moxifloxacin. 4. Skin toxicity manifested as rash, itching, decreased sensation, pain, skin erythema, etc. Temporarily discontinue the drug, and apply topical erythromycin ointment and other treatments. Adverse reactions should seek medical attention. Specific drug use, it is recommended to use under the guidance of a professional physician, not blindly self-medication, in order to avoid adverse effects.