A 22-yeаr-оld UW-Mаdisоn student stаrted getting a sоre throat last night just before bedtime. When they got up today, the sore throat was much worse, and they tried gargling with salt water without much lasting benefit. The student has an exam today and would like to buy a throat lozenge product that would provide temporary relief of their sore throat so they will be more comfortable during the exam. Which of the following should the student look for on the “active ingredient” portion of the drug product label to help with sore throat?