An 8-month-old baby can drink 2.5-3mL ibuprofen, but ibuprofen can only play a role in reducing fever, which usually lasts for 4-6h, after which it can be repeated and has no corresponding therapeutic effect on the cause of the fever, so the baby’s mental state needs to be observed after oral ibuprofen antipyretic treatment. If the fever is simple and the mental state is good, no other treatment is needed. If your baby has a poor mental state in addition to fever, accompanied by obvious vomiting, abdominal pain or abnormal urination and defecation, you need to go to the hospital promptly because the early manifestations of many diseases are not typical and may only show symptoms of fever similar to the flu.