All antipyretics, including ibuprofen granules, will take effect about half an hour after taking them.

All antipyretics must be taken at intervals of more than 4 hours, preferably 6 hours.

All antipyretics should be taken when the fever is above 38.5 degrees.

When the body temperature is lower than 38.5 degrees, reduce the fever by physical means. When the cold and fever are below 38.5 degrees, you can take anti-cold medicine to reduce the low fever.