There are many antipyretic drugs in modern medicine. For example, aspirin. The reason why aspirin can reduce fever is that prostaglandin E2 is a "messenger" that tells the brain that the body temperature is too low. Aspirin can inhibit the synthesis of prostaglandin E2. So aspirin is antipyretic Good medicine. If the above argument is to be true, one of the following premises needs to be added? ['Aspirin can fight the influenza virus.', 'Prostaglandin E2 can affect body temperature.', "Aspirin's antipyretic effect has been clinically proven.", '-Once the body temperature is too low. The brain will direct the body to fever.']