Efficacy Of Pf-04531083 In Treating Post-Surgical Dental Pain

PPR was defined as the highest PR score achieved at any time point during the evaluation period, prior to rescue medication. PR was assessed on a 5-point categorical scale; 0 (none), 1 (a little), 2 (some), 3 (a lot) and 4 (complete).

PR was assessed on a 5-point categorical scale; 0 (none), 1 (a little), 2 (some), 3 (a lot) and 4 (complete) at each relevant time points.

Pain intensity was assessed on a categorical scale ranging from 0 (none), 1 (mild), 2 (moderate) and 3 (severe). PID was calculated as pain intensity at baseline minus pain intensity at the respective post-baseline visit.

Pain intensity was assessed on a categorical scale ranging from 0 (none), 1 (mild), 2 (moderate) and 3 (severe). PID was calculated as pain intensity at baseline minus pain intensity at the respective post-baseline visit. The SPID at 6 and 24 hours was derived by calculating the area under the PID effect curve through the first 6 or 24 hours post-dose respectively. The AUC was calculated using the trapezoid rule. Total score range: -6 (worst) to 18 (best) for SPID 0-6, and -24 (worst) to 72 (best) for SPID 0-24. Higher value of SPID indicated greater degree of pain relief.

TOTPAR [24] was defined as the area under the pain relief (PR) curve through the 24 hours after dosing. Area under the curve (AUC) was calculated using the trapezoid rule with PR assumed to be 0 at time=0. PR was assessed on a 5-point categorical scale; 0 (none), 1 (a little), 2 (some), 3 (a lot) and 4 (complete), at 15, 30, 45, minutes and at different time points during the study up to 24 hours post-dose. Total score range for TOTPAR [24]: 0 (worst) - 96 (best), higher value of TOTPAR indicated greater degree of PR.

Participants evaluated the time to first perceptible relief by stopping a stopwatch labeled 'first perceptible relief' at the moment they first began to experience any relief.

Participants evaluated the time to first meaningful relief by stopping a second stopwatch labeled 'meaningful relief' at the moment they first began to experience meaningful relief.

Time to first use of rescue medication (2 tablets of acetaminophen 500 mg as starting dose) was calculated by subtracting time of first administration of study medication from the rescue medication administration time.

Participants who did not experience adequate pain relief after 90 minutes post-dose of study medication had received 2 tablets of acetaminophen 500 mg as rescue medication.

Participant rated the study medication that they received during the study, at both the 6 hour and 24 hour observations or at time of rescue medication, whichever occurs first, by answering the following question on 6-point categorical scale: how would you rate the study medication you received for pain? 5=excellent, 4=very good, 3=good, 2=fair and 1=poor.

Participant's response to 2 questions about "how satisfied or dissatisfied they were with the study medication for PR and overall performance (OP)" was obtained on a 5 point categorical scale, 1=very dissatisfied, 2=somewhat dissatisfied, 3=neither satisfied nor dissatisfied, 4=somewhat satisfied and 5=very satisfied.

AUC (0-6)= Area under the plasma concentration versus time curve from time zero (pre-dose) to 6 hours post-dose concentration.

AUC (0-24)= Area under the plasma concentration versus time curve from time zero (pre-dose) to 24 hours post-dose concentration.

AUC (0-6)= Area under the plasma concentration versus time curve from time zero (pre-dose) to 6 hours post-dose concentration.

AUC (0-24)= Area under the plasma concentration versus time curve from time zero (pre-dose) to 24 hours post-dose concentration.

An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. An SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial/prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Treatment-emergent are events between first dose of study drug and up to Day 10 to 14.

Hematology (hemoglobin, hematocrit, red blood cell count, platelets, leukocytes, total neutrophils, eosinophils, basophils, lymphocytes, monocytes); liver function (total bilirubin, direct bilirubin, indirect bilirubin, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, albumin, total protein); renal function (creatinine, blood urea nitrogen, uric acid, sodium, potassium, chloride, bicarbonate, calcium); urinalysis (urine pH, glucose, ketones, protein, blood, nitrite, leukocyte esterase), and clinical chemistry (glucose) were performed.

Supine systolic and diastolic BP was measured after the participant has been rested in the supine position for at least 5 minutes with the participant's arm supported at the level of the heart, and recorded to the nearest millimeters of mercury (mmHg). The same arm and position and same size BP cuff was used throughout the study.

Standard 12-lead ECG was performed after the participant has rested quietly for at least 10 minutes in a supine position. ECG intervals included PR interval (time between the onset of atrial depolarization and the onset of ventricular depolarization), QRS interval (represented ventricular depolarization) and QT interval (time corresponding to the beginning of depolarization to repolarization of the ventricles) corrected using Fridericia's formula (QTcF = QT divided by cube root of RR interval).

Standard 12-lead ECG was performed after the participant has rested quietly for at least 10 minutes in a supine position. The time interval between consecutive heart beats (RR interval) was used to calculate heart rate.

Supine pulse rate was measured in the brachial/radial artery for at least 30 seconds.