There are many drugs that can clear away heat in modern medicine, such as aspirin. Aspirin can reduce fever because prostaglandin E2 is the messenger that tells the brain to hypothermia, and aspirin can inhibit the synthesis of prostaglandin E2. So aspirin is a good medicine for clearing away heat.
If the temperature is too low, the brain will direct the body to heat up can be supplemented as a premise to establish the above argument.