A medicine used to reduce fever (an antipyretic); a drug that lowers body temperature and relieves discomfort caused by fever.
子どもが高熱を出したので、小児用の解熱剤を飲ませた。
My child had a high fever, so I gave them a pediatric antipyretic.
風邪で38度出たときは、まず解熱剤で熱を下げて安静にしてください。
If you have a fever of 38°C from a cold, first lower the fever with an antipyretic and rest.
薬局で市販の解熱剤を買っておいたほうが安心だ。
It's a good idea to have an over-the-counter antipyretic from the pharmacy on hand.