Sugar-based, flavoured flurbiprofen 8.75 mg lozenge. Instructions were to suck one lozenge until gone, every 3-6 hours as needed for pain. The participant took nothing by mouth except study medication during the first two hours while at the site. For each re-dosing during the remaining time in the study, alcohol and caffeine-containing beverages (e.g., coffee, tea, hot chocolate, caffeinated soft drinks) were not consumed within 1 hour before the participant used a study medication lozenge.

Rescue medication to be taken as needed. Rescue medication was not blinded.

DSS measures difficulty swallowing (dysphagia) using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how difficult it is to swallow now." A mark at 0-mm indicated not difficult and 100-mm indicated very difficult.

Data are reported as the sum of the time-weighted pain intensity differences from baseline until 24 hours post dose. The full range was -102960 (no difficulty swallowing within 1 hour of dosing that lasts 24 hours) to 29040 (maximum difficulty swallowing within 1 hour of dosing lasting 24 hours) using the baseline DSS value. Negative values indicate improvement in difficulty swallowing.

Missing values of DSS with non-missing values at assessments before and after were calculated using linear interpolation.

SwoTS measures how swollen a participant's throat felt using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how swollen your throat feels now." A mark at 0-mm indicated not swollen and 100-mm indicated very swollen.

The full range of the sum of the time-weighted swollen throat differences from baseline until 2 hours was -9120 (throat did not feel swollen at all within 1 hour of dosing and lasted 2 hours) to 2880 (maximum swollen throat reported within 1 hour and lasting 2 hours) using the mean baseline SwoTS.

Negative values for the differences indicate improvement. Missing values of SwoTS with non-missing values at assessments before and after were calculated using linear interpolation.

SwoTS measures how swollen a participant's throat felt using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how swollen your throat feels now." A mark at 0-mm indicated not swollen and 100-mm indicated very swollen.

The full range of the sum of the time-weighted swollen throat differences from baseline until 24 hours was -100320 (throat did not feel swollen at all within 1 hour of dosing and lasted 24 hours) to 31680 (maximum swollen throat reported within 1 hour and lasting 24 hours) using the mean baseline SwoTS. Negative values for differences indicate improvement.

STPIS measures sore throat pain intensity on a 100-mm visual analog scale completed by participants. A mark at 0-mm indicates no pain upon swallowing and 100-mm indicates severe pain. SPID2 was calculated as the sum of the time weighted pain intensity differences from baseline until 2 hours post dose. The full range was -9492 (complete pain relief within one hour of dosing that lasts 2 hours) to 2508 (maximum pain within 1 hour lasting 2 hours) using the mean baseline STPIS.

If a participant used rescue medication (acetaminophen 650mg was allowed as needed post dose), all post-rescue STPIS values in the 24-hour interval were assigned the baseline value for STPIS. Missing scores of STPIS with non-missing STPIS scores at earlier and later assessments (recorded or derived due to rescue) were imputed using linear interpolation assuming the time of the missing assessment to be the nominal time since initial dose.

STPIS measures sore throat pain intensity on a 100-mm visual analog scale completed by participants. A mark at 0-mm indicates no pain upon swallowing and 100-mm indicates severe pain. For the subgroup of patients with moderate/severe pharyngeal inflammation at baseline, SPID24 was calculated as the sum of the time weighted pain intensity differences from baseline until 24 hours. Taking inclusion criteria into account, the full range was -115695 (no pain at any post-dose time (0) - average baseline) to 28505 (maximum possible pain (100) - average baseline).

Participants with their last recorded time point <21 hours were considered Not Evaluable. If a participant used rescue medication, all post-rescue STPIS values in the 24-hour interval were assigned the baseline value for STPIS. Missing scores of STPIS with non-missing STPIS scores at earlier and later assessments were imput

Participants graded the relief of his/her sore throat at 2 hours post initial dose using the Sore Throat Relief Rating Scale (STRRS), which is a 6-category relief scale.

The patient was instructed to swallow and asked:

"Considering how your throat felt before you took the study medicine, circle the phrase that best describes the relief of your sore throat now." Responses were no relief, slight, mild, moderate, considerable, and complete relief.

Investigators assessed the effectiveness of study medication on the patient's sore throat at 24 hours following initial dose by answering the following question: "Considering the patient's response to the study medicine over the past 24 hours, how do you rate the study medicine as a treatment for sore throat?" Responses were poor, fair, good, very good or excellent.

After 24 hours of treatment, participants rated their satisfaction with the treatment on a 7-step scale from extremely dissatisfied to extremely satisfied.

Investigators assessed the effectiveness of study medication on the patient's sore throat at the end of study by answering the following question: "Considering the patient's response to the study medicine over the past 7 days, how do you rate the study medicine as a treatment for sore throat?" Responses were poor, fair, good, very good or excellent.

The time weighted summed differences over 2 hours after taking a lozenge after the initial 24-hours post-baseline.

STPIS is a validated 100-mm visual analog scale completed by participants that measures "pain on swallowing" (odynophagia). A mark at 0-mm indicates no pain and 100-mm indicates severe pain. SPID2 was calculated as the sum of the time-weighted pain intensity differences from a measurement taken prior to taking a lozenge and at hours 1 + 2 after taking the lozenge during Days 2-7. Data for multiple doses/days were averaged to obtain the values used for calculating SPID2. The full range for SPID2 was -5843 to 6157 with negative values indicating improvement in pain intensity. Assessments were summarized using a repeated measures mixed model, with treatment and center as a fixed effect, time since Baseline as a covariate, and a random effect for participants.

The time weighted summed differences over 2 hours after taking a lozenge for all lozenges taken after the initial 24-hours post-baseline.

To measure the functional effect on pharyngitis, the participant was asked to evaluate his/her difficulty swallowing (dysphagia) using a 100-mm visual analog scale prior to dosing, and 1 hour and 2 hours post dose. The participant was instructed to swallow and "Place a line on the scale that best characterizes how difficult it is to swallow now." A mark at 0-mm indicated not difficult and 100-mm indicated very difficult. Data for multiple doses/days were averaged to obtain the values used for calculating DSS2. The full range for differences was -5626 to 6374 with negative values indicating improvement in pain intensity.

Assessments were summarized using a repeated measures mixed model, with treatment and center as a fixed effect, time since Baseline as a covariate, and a random effect for participants.

The time weighted summed differences over 2 hours after taking a lozenge for all lozenges taken after the initial 24-hours post-baseline.

The participant was asked to evaluate how swollen his/her throat felt using a 100-mm visual analog scale prior to dosing, and 1 hour and 2 hours post dose.

The patient was instructed to swallow and "Place a line on the scale that best characterizes how swollen your throat feels now." A mark at 0-mm indicated not swollen and 100-mm indicated very swollen. Data for multiple doses/days were averaged to obtain the values used for calculating SWoTS2. The full range for differences was -5396 to 6604 with negative values indicating improvement in pain intensity.

Assessments were summarized using a repeated measures mixed model, with treatment and center as a fixed effect, time since Baseline as a covariate, and a random effect for participants.

Participants graded the relief of his/her sore throat at 2 hours after taking a lozenge for all lozenges taken after the initial 24-hours post-baseline using the Sore Throat Relief Rating Scale (STRRS), which is a 6-category relief scale.

The patient was instructed to swallow and:

"Considering how your throat felt before you took the study medicine, circle the phrase that best describes the relief of your sore throat now." Responses following each lozenge were no relief, slight, mild, moderate, considerable, and complete relief. Results summarize responses 2 hours after taking each lozenge.

Participants were allowed a dose of rescue medication (acetaminophen 650mg), as needed, post-treatment dosing during the study.

Participants were allowed a dose of rescue medication (acetaminophen 650mg), as needed, post-treatment during the study. Time from initial dose to first rescue medication is summarized by time categories.

Total of all reporting groups

STPIS measures sore throat pain intensity on a 100-mm visual analog scale completed by participants. A mark at 0-mm indicates no pain upon swallowing and 100-mm indicates severe pain.

DSS measures difficulty swallowing (dysphagia) using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how difficult it is to swallow now." A mark at 0-mm indicated not difficult and 100-mm indicated very difficult.

SwoTS measures how swollen a participant's throat felt using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how swollen your throat feels now." A mark at 0-mm indicated not swollen and 100-mm indicated very swollen.

DSS measures difficulty swallowing (dysphagia) using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how difficult it is to swallow now." A mark at 0-mm indicated not difficult and 100-mm indicated very difficult.

Data are reported as the sum of the time-weighted pain intensity differences from baseline until 2 hours post dose. The full range was -9360 (no difficulty swallowing within 1 hour of dosing that lasts 2 hours) to 2640 (maximum difficulty swallowing within 1 hour of dosing lasting 2 hours) using the baseline DSS value.

Missing values of DSS with non-missing values at assessments before and after were calculated using linear interpolation.

Intent to treat population of participants who took the first full dose of medication

DSS measures difficulty swallowing (dysphagia) using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how difficult it is to swallow now." A mark at 0-mm indicated not difficult and 100-mm indicated very difficult.

Data are reported as the sum of the time-weighted pain intensity differences from baseline until 24 hours post dose. The full range was -102960 (no difficulty swallowing within 1 hour of dosing that lasts 24 hours) to 29040 (maximum difficulty swallowing within 1 hour of dosing lasting 24 hours) using the baseline DSS value. Negative values indicate improvement in difficulty swallowing.

Missing values of DSS with non-missing values at assessments before and after were calculated using linear interpolation.

Intent to treat population. Four participants (2 Flurbiprofen and 2 placebo) did not have DSS recorded after 21 hours and were not included in the analysis.

SwoTS measures how swollen a participant's throat felt using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how swollen your throat feels now." A mark at 0-mm indicated not swollen and 100-mm indicated very swollen.

The full range of the sum of the time-weighted swollen throat differences from baseline until 2 hours was -9120 (throat did not feel swollen at all within 1 hour of dosing and lasted 2 hours) to 2880 (maximum swollen throat reported within 1 hour and lasting 2 hours) using the mean baseline SwoTS.

Negative values for the differences indicate improvement. Missing values of SwoTS with non-missing values at assessments before and after were calculated using linear interpolation.

Intent to treat population of participants who took the first full dose of medication

SwoTS measures how swollen a participant's throat felt using a 100-mm visual analog scale completed by participants. Participants were instructed to swallow and "Place a line on the scale that best characterizes how swollen your throat feels now." A mark at 0-mm indicated not swollen and 100-mm indicated very swollen.

The full range of the sum of the time-weighted swollen throat differences from baseline until 24 hours was -100320 (throat did not feel swollen at all within 1 hour of dosing and lasted 24 hours) to 31680 (maximum swollen throat reported within 1 hour and lasting 24 hours) using the mean baseline SwoTS. Negative values for differences indicate improvement.

Intent to treat population. Four participants (2 Flurbiprofen, 2 Vehicle) did not have SwoTS recorded after 21 hours and were not included in the analysis.

STPIS measures sore throat pain intensity on a 100-mm visual analog scale completed by participants. A mark at 0-mm indicates no pain upon swallowing and 100-mm indicates severe pain. SPID2 was calculated as the sum of the time weighted pain intensity differences from baseline until 2 hours post dose. The full range was -9492 (complete pain relief within one hour of dosing that lasts 2 hours) to 2508 (maximum pain within 1 hour lasting 2 hours) using the mean baseline STPIS.

If a participant used rescue medication (acetaminophen 650mg was allowed as needed post dose), all post-rescue STPIS values in the 24-hour interval were assigned the baseline value for STPIS. Missing scores of STPIS with non-missing STPIS scores at earlier and later assessments (recorded or derived due to rescue) were imputed using linear interpolation assuming the time of the missing assessment to be the nominal time since initial dose.

Intent to treat population

STPIS measures sore throat pain intensity on a 100-mm visual analog scale completed by participants. A mark at 0-mm indicates no pain upon swallowing and 100-mm indicates severe pain. For the subgroup of patients with moderate/severe pharyngeal inflammation at baseline, SPID24 was calculated as the sum of the time weighted pain intensity differences from baseline until 24 hours. Taking inclusion criteria into account, the full range was -115695 (no pain at any post-dose time (0) - average baseline) to 28505 (maximum possible pain (100) - average baseline).

Participants with their last recorded time point <21 hours were considered Not Evaluable. If a participant used rescue medication, all post-rescue STPIS values in the 24-hour interval were assigned the baseline value for STPIS. Missing scores of STPIS with non-missing STPIS scores at earlier and later assessments were imput

Intent to treat population of participants who took the first full dose of medication and had moderate or severe pharyngeal inflammation at baseline.

Participants graded the relief of his/her sore throat at 2 hours post initial dose using the Sore Throat Relief Rating Scale (STRRS), which is a 6-category relief scale.

The patient was instructed to swallow and asked:

"Considering how your throat felt before you took the study medicine, circle the phrase that best describes the relief of your sore throat now." Responses were no relief, slight, mild, moderate, considerable, and complete relief.

Intent to treat population

Investigators assessed the effectiveness of study medication on the patient's sore throat at 24 hours following initial dose by answering the following question: "Considering the patient's response to the study medicine over the past 24 hours, how do you rate the study medicine as a treatment for sore throat?" Responses were poor, fair, good, very good or excellent.

Intent to treat population. CLIN was not performed for 3 participants (1 Flurbiprofen, 2 placebo).

After 24 hours of treatment, participants rated their satisfaction with the treatment on a 7-step scale from extremely dissatisfied to extremely satisfied.

Intent to treat population. One placebo participant did not complete a Patient Satisfaction Score.

Investigators assessed the effectiveness of study medication on the patient's sore throat at the end of study by answering the following question: "Considering the patient's response to the study medicine over the past 7 days, how do you rate the study medicine as a treatment for sore throat?" Responses were poor, fair, good, very good or excellent.

Intent to treat population of participants who completed the study. CLIN was missing for one flurbiprofen participant.

The time weighted summed differences over 2 hours after taking a lozenge after the initial 24-hours post-baseline.

STPIS is a validated 100-mm visual analog scale completed by participants that measures "pain on swallowing" (odynophagia). A mark at 0-mm indicates no pain and 100-mm indicates severe pain. SPID2 was calculated as the sum of the time-weighted pain intensity differences from a measurement taken prior to taking a lozenge and at hours 1 + 2 after taking the lozenge during Days 2-7. Data for multiple doses/days were averaged to obtain the values used for calculating SPID2. The full range for SPID2 was -5843 to 6157 with negative values indicating improvement in pain intensity. Assessments were summarized using a repeated measures mixed model, with treatment and center as a fixed effect, time since Baseline as a covariate, and a random effect for participants.

Intent to treat population of participants who were active in the study on day 2. For doses where rescue medication was taken within the 2 hour assessment, all following differences were imputed as zero.

The time weighted summed differences over 2 hours after taking a lozenge for all lozenges taken after the initial 24-hours post-baseline.

To measure the functional effect on pharyngitis, the participant was asked to evaluate his/her difficulty swallowing (dysphagia) using a 100-mm visual analog scale prior to dosing, and 1 hour and 2 hours post dose. The participant was instructed to swallow and "Place a line on the scale that best characterizes how difficult it is to swallow now." A mark at 0-mm indicated not difficult and 100-mm indicated very difficult. Data for multiple doses/days were averaged to obtain the values used for calculating DSS2. The full range for differences was -5626 to 6374 with negative values indicating improvement in pain intensity.

Assessments were summarized using a repeated measures mixed model, with treatment and center as a fixed effect, time since Baseline as a covariate, and a random effect for participants.

Intent to treat population of participants who were active in the study on day 2. For doses where rescue medication was taken within the 2 hour assessment, all following differences were imputed as zero.

The time weighted summed differences over 2 hours after taking a lozenge for all lozenges taken after the initial 24-hours post-baseline.

The participant was asked to evaluate how swollen his/her throat felt using a 100-mm visual analog scale prior to dosing, and 1 hour and 2 hours post dose.

The patient was instructed to swallow and "Place a line on the scale that best characterizes how swollen your throat feels now." A mark at 0-mm indicated not swollen and 100-mm indicated very swollen. Data for multiple doses/days were averaged to obtain the values used for calculating SWoTS2. The full range for differences was -5396 to 6604 with negative values indicating improvement in pain intensity.

Assessments were summarized using a repeated measures mixed model, with treatment and center as a fixed effect, time since Baseline as a covariate, and a random effect for participants.

Intent to treat population of participants who were active in the study on day 2

Participants graded the relief of his/her sore throat at 2 hours after taking a lozenge for all lozenges taken after the initial 24-hours post-baseline using the Sore Throat Relief Rating Scale (STRRS), which is a 6-category relief scale.

The patient was instructed to swallow and:

"Considering how your throat felt before you took the study medicine, circle the phrase that best describes the relief of your sore throat now." Responses following each lozenge were no relief, slight, mild, moderate, considerable, and complete relief. Results summarize responses 2 hours after taking each lozenge.

Intent to treat population of participants who were active in the study on day 2

Participants were allowed a dose of rescue medication (acetaminophen 650mg), as needed, post-treatment dosing during the study.

Intent to treat population

Participants were allowed a dose of rescue medication (acetaminophen 650mg), as needed, post-treatment during the study. Time from initial dose to first rescue medication is summarized by time categories.

Intent to treat population

Safety population

Safety population of participants with a recording at the end of study visit.

Participants were instructed to suck one study (placebo) lozenge every 3-6 hours, up to a total of 5 study lozenges in 24 hours for the 7 days of the study. Rescue medication (acetaminophen 650mg) was allowed as needed.