18. What is the purpose of an antipyretic? la. relieve headache b. reduce fever C. reduce swelling d Trelax muscles

## Step 1<br />The question is asking for the primary purpose of an antipyretic. An antipyretic is a type of medication that is used to reduce fever. <br /><br />## Step 2<br />While some antipyretics may also relieve headaches, this is not their primary function. Therefore, option A is not the correct answer.<br /><br />## Step 3<br />Similarly, antipyretics do not primarily reduce swelling or relax muscles. Therefore, options C and D are not the correct answers.