Vaccines cannot be given for two days after stopping medication. Generally speaking, the vaccine can only be given after the child has stopped taking the medication for 3 days, because after 3 days, the medication has been completely metabolized in the body and excreted, and the injection will not cause any adverse reactions due to drug interactions. The best time to get vaccinated is one week later, when the drug has been metabolized and the body is back to a healthy state. Vaccination is an effective means of preventing infectious diseases contracted by certain pathogenic microorganisms (e.g. bacteria, rickettsiae, viruses, etc.). Babies cannot be vaccinated when they are on medication because the vaccination itself may cause fever, rash, and discomfort, and babies cannot be vaccinated when they are not in good condition themselves. It should be noted that, during the vaccination period, if the child is in discomfort, vomiting, diarrhea and severe coughing and other symptoms, after obtaining the doctor’s consent, you can temporarily do not take the vaccination, and then make up for it when the symptoms improve. Children with asthma, eczema, urticaria and allergic constitution are prone to allergic reactions after vaccination, especially measles vaccine, mixed vaccine of 100, white and tetanus with strong allergens. Children with a history of epilepsy and convulsions are susceptible to fainting, cramps and shock after vaccination, especially with B-brain vaccine and DPT vaccine. When injecting the above mentioned vaccines, parents need to pay extra attention to the occurrence of allergies in their children. Not all symptoms are completely resolved when the medication is stopped, so it is important to have your child examined by a doctor to determine if he or she is suitable for vaccination.