Neocoronavirus vaccine is the new coronavirus vaccine. You can take cetirizine after the new coronavirus vaccine if it is needed for your illness. Cetirizine is an anti-allergic drug, commonly used clinically for the treatment of allergic rhinitis, allergen-induced urticaria and skin itching. For some patients who received the new coronavirus vaccine, if it is needed for disease, such as vaccination induced allergic reaction, etc., then you can take cetirizine as prescribed by the doctor to control the condition, and it also helps to alleviate the uncomfortable symptoms. Some people with cetirizine may experience transient, mild adverse reactions, such as drowsiness, headache and dizziness. Cetirizine is contraindicated if you are allergic to cetirizine, pregnant or breastfeeding. Drivers, operating machinery or working at heights should pay attention to the cautious use of this drug, renal impairment need to follow the doctor’s advice to reduce the amount of application. It is recommended to consult a regular hospital for injection of the new coronavirus vaccine, and stay in the hospital for a period of observation after vaccination, so as to deal with allergic reactions and other emergencies in a timely manner. Pay attention to the use of cetirizine under the guidance of a physician, do not use the drug on their own.