Patients received additional study lozenges for use as needed (up to 5 lozenges per 24 hours) over the following 6 days, rescue medication (acetaminophen 650 mg) and a Diary to document their safety and efficacy assessments immediately before and postdose after each as-needed use of a lozenge for the remaining days in the 7-day treatment period. At the end of the 7-day trial, patients returned to the research center for final assessments, review of adverse events over the week, and discharge from the study.