Cough drops and throat lozenges are very similar. They both contain medications, such as menthol, that help quiet a cough. A throat lozenge also has an analgesic, like benzocaine, that helps to soothe a sore throat.  Sucking on a lozenge or cough drop increases saliva production. This helps prevent throat dryness and soothe irritated and itchy throats, suppressing the urge to cough.