Post-operative Dental Pain Study Comparing Analgesic Efficacy

A Study to Compare the Analgesic Efficacy of Two Different Paracetamol Doses as Measured by Post-operative Dental Pain Relief

GlaxoSmithKline will be conducting this trial to compare analgesics efficacy of paracetamol 1000mg vs 500mg . The post-surgical dental pain model will be used to evaluate the analgesic efficacy of paracetamol. Each subject will be enrolled in the study for up to six weeks. The duration of the entire study will be approximately 16 weeks. Each subject will have to come to the clinic for three visits (Screening, Treatment and Follow up visits).

Study Overview

• Status: Completed
• Conditions: Post-surgical Dental Pain
• Intervention / Treatment: Drug: Placebo; Drug: Paracetamol 1000 mg; Drug: Paracetamol 500 mg

• Study Type: Interventional
• Enrollment (Actual): 300
• Phase: Phase 4

Contacts and Locations

Study Locations

• United States
  • Texas
    • Austin, Texas, United States, 78744
      • PPD Dental Clinic
  • Utah
    • Salt Lake City, Utah, United States, 84124
      • Jean Brown Research

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 45 years (ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Subjects aged 18-45 years with moderate-to-severe dental pain assessed by verbal rating scale (VRS) and confirmed by a score of at least 50 mm out of 100 mm using a visual analogue scale (VAS) following surgical removal of third molars, of which at least one has to be a mandibular partially bony or full bony impaction.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: TREATMENT
• Allocation: RANDOMIZED
• Interventional Model: PARALLEL
• Masking: DOUBLE

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
PLACEBO_COMPARATOR: Placebo	Drug: Placebo; Placebo
EXPERIMENTAL: Paracetamol 1000 mg	Drug: Paracetamol 1000 mg; Paracetamol 1000 mg
EXPERIMENTAL: Paracetamol 500 mg	Drug: Paracetamol 500 mg; Paracetamol 500 mg

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Sum of Pain Relief and Pain Intensity Differences From 0 to 6 Hours (SPRID 6 Hours)	SPRID:Sum of Pain Intensity Difference (SPID) and Total Pain Relief (TOTPAR) at each post-dosing time-point. SPRID score ranged from -5.8 (least pain relief) to 40.3 (highest pain relief). SPID and TOTPAR were calculated as weighted sums of Pain Intensity Differences (PID) and Pain Relief Scores (PRS) at each measurement time, respectively. PID was derived by subtracting the pain severity score at a given post-dosing time-point from the baseline [pain severity score range:0-no pain, 1-mild pain, 2-moderate pain, 3-severe pain using a 4-point categorical Verbal Rating Scale (VRS)]. If the subject rated pain intensity as 2 or 3, pain was assessed using a 100 mm Visual Analog Scale (VAS) [0 (no pain), 100 (worst pain)]. VAS scores were converted into PID scores by subtracting them from baseline pain scores. PRS was assessed on 5-point categorical pain relief rating scale [0-no relief, 1-little relief, 2-some relief, 3-a lot of relief, 4-complete relief]	Every two hours from baseline to 6 hours post dose

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Time to Confirmed First Perceptible Pain Relief	Participants recorded the time to first perceptible relief by starting the first stopwatch at the time of dosing and stopping it when he/she experienced the first perceptible pain relief. The first perceptible pain relief was confirmed if the participant also stopped the second stopwatch indicating meaningful relief.	Baseline to 6 hours post dose
Time to Onset of Meaningful Pain Relief	Participants evaluated the time to meaningful relief by stopping a second stopwatch when they first began to experience meaningful relief.	Baseline to 6 hours post dose
Time to Start Using Rescue Medication	Median time of use of rescue medication by participants was calculated.	Baseline to 6 hours post dose
Percentage of Participants Who Took Rescue Medication Within 2 Hours	Percentage of participants who received rescue medication within 2 hours	Baseline to 2 hours post dose
Percentage of Participants Who Took Rescue Medication During 2 to 6 Hours	Percentage of participants who took rescue medication during 2 to 6 hours	Within 2 to 6 hours post dose
SPRID at 2 Hours	SPRID:Sum of Pain Intensity Difference (SPID) and Total Pain Relief (TOTPAR) at each post-dosing time-point. SPRID score ranged from -1.8 (least pain relief) to 12.3 (highest pain relief). SPID and TOTPAR were calculated as weighted sums of Pain Intensity Differences (PID) and Pain Relief Scores (PRS) at each measurement time, respectively. PID was derived by subtracting the pain severity score at a given post-dosing time-point from the baseline [pain severity score range:0-no pain, 1-mild pain, 2-moderate pain, 3-severe pain using a 4-point categorical Verbal Rating Scale (VRS)]. If the subject rated pain intensity as 2 or 3, pain was assessed using a 100 mm Visual Analog Scale (VAS) [0 (no pain), 100 (worst pain)]. VAS scores were converted into PID scores by subtracting them from baseline pain scores. PRS was assessed on 5-point categorical pain relief rating scale [0-no relief, 1-little relief, 2-some relief, 3-a lot of relief, 4-complete relief]	Every two hours from baseline to 2 hours post dose
SPRID at 4 Hours	SPRID:Sum of Pain Intensity Difference (SPID) and Total Pain Relief (TOTPAR) at each post-dosing time-point. SPRID score ranged from -3.8 (least pain relief) to 26.3 (highest pain relief). SPID and TOTPAR were calculated as weighted sums of Pain Intensity Differences (PID) and Pain Relief Scores (PRS) at each measurement time, respectively. PID was derived by subtracting the pain severity score at a given post-dosing time-point from the baseline [pain severity score range:0-no pain, 1-mild pain, 2-moderate pain, 3-severe pain using a 4-point categorical Verbal Rating Scale (VRS)]. If the subject rated pain intensity as 2 or 3, pain was assessed using a 100 mm Visual Analog Scale (VAS) [0 (no pain), 100 (worst pain)]. VAS scores were converted into PID scores by subtracting them from baseline pain scores. PRS was assessed on 5-point categorical pain relief rating scale [0-no relief, 1-little relief, 2-some relief, 3-a lot of relief, 4-complete relief]	Every two hours from baseline to 4 hours post dose
Total Pain Relief (TOTPAR) at 2 Hours	TOTPAR was calculated as sum of products of pain relief (PR) at a given time-point (t) with the time-interval from that time-point to the previous time-point (t-1). The time-intervals used were 0-15, 15-30, 30-45, 45-60, 60-90, 90-120. Higher score indicated greater pain relief. TOTPARt = ∑PR x (timet - timet-1). PR score was assessed at each of the above time-points based on a 5-point categorical scale [0-no relief, 1-little relief, 2-meaningful relief, 3-a lot of relief, 4-complete relief].	Every two hours from baseline to 2 hours post dose
TOTPAR at 4 Hours	TOTPAR was calculated as sum of products of pain relief (PR) at a given time-point (t) with the time-interval from that time-point to the previous time-point (t-1). The time-intervals used were 0-15, 15-30, 30-45, 45-60, 60-90, 90-120, 120-240. Higher score indicated greater pain relief. TOTPARt = ∑PR x (timet - timet-1). PR score was assessed at each of the above time-points based on a 5-point categorical scale [0-no relief, 1-little relief, 2-meaningful relief, 3-a lot of relief, 4-complete relief].	Every two hours from baseline to 4 hours post dose
TOTPAR at 6 Hours	TOTPAR was calculated as sum of products of pain relief (PR) at a given time-point (t) with the time-interval from that time-point to the previous time-point (t-1). The time-intervals used were 0-15, 15-30, 30-45, 45-60, 60-90, 90-120, 120-240, 240-300 and 300-360. Higher score indicated greater pain relief. TOTPARt = ∑PR x (timet - timet-1). PR score was assessed at each of the above time-points based on a 5-point categorical scale [0-no relief, 1-little relief, 2-meaningful relief, 3-a lot of relief, 4-complete relief].	Every two hours from baseline to 6 hours post dose
Sum of Pain Intensity Difference (SPID) Scores at 2 Hours	SPID was calculated as sum of products of Pain Intensity Differences (PID) at a given time-point (t) with the time-interval from that time-point to the previous time-point (t-1). The time-intervals used were 0-15, 15-30, 30-45, 45-60, 60-90, 90-120. Positive and higher scores indicate greater reduction in pain. SPIDt = ∑PID x (timet - timet-1) Pain Intensity was assessed at baseline and at each time-point based on a 4-point categorical Verbal Rating Scale (VRS) scale: 0-no pain, 1-mild pain, 2-moderate pain, 3-severe pain. If the subject rated pain intensity as "2" or "3", pain was assessed using a 100 mm Visual Analog Scale (VAS) [0 (no pain), 100 (worst pain)]. VAS scores were converted into PID scores by subtracting them from pain scores taken at baseline.	Every two hours from baseline to 2 hours post dose
SPID Scores at 4 Hours	SPID was calculated as sum of products of Pain Intensity Differences (PID) at a given time-point (t) with the time-interval from that time-point to the previous time-point (t-1). The time-intervals used were 0-15, 15-30, 30-45, 45-60, 60-90, 90-120, 120-240. Positive and higher scores indicate greater reduction in pain. SPIDt = ∑PID x (timet - timet-1) Pain Intensity was assessed at baseline and at each time-point based on a 4-point categorical Verbal Rating Scale (VRS) scale: 0-no pain, 1-mild pain, 2-moderate pain, 3-severe pain. If the subject rated pain intensity as "2" or "3", pain was assessed using a 100 mm Visual Analog Scale (VAS) [0 (no pain), 100 (worst pain)]. VAS scores were converted into PID scores by subtracting them from pain scores taken at baseline.	Every two hours from baseline to 4 hours post dose
SPID Scores at 6 Hours	SPID was calculated as sum of products of Pain Intensity Differences (PID) at a given time-point (t) with the time-interval from that time-point to the previous time-point (t-1). The time-intervals used were 0-15, 15-30, 30-45, 45-60, 60-90, 90-120, 120-240, 240-300 and 300-360. Positive and higher scores indicate greater reduction in pain. SPIDt = ∑PID x (timet - timet-1) Pain Intensity was assessed at baseline and at each time-point based on a 4-point categorical Verbal Rating Scale (VRS) scale: 0-no pain, 1-mild pain, 2-moderate pain, 3-severe pain. If the subject rated pain intensity as "2" or "3", pain was assessed using a 100 mm Visual Analog Scale (VAS) [0 (no pain), 100 (worst pain)]. VAS scores were converted into PID scores by subtracting them from pain scores taken at baseline.	Every two hours from baseline to 6 hours post dose
Participants Global Assessment to Response to Treatment (PGART)	PGART was measured by a score in a scale from 0-4: 0- Poor; 1- Fair 2- Good; 3- Very Good; 4- Excellent.	Baseline to 6 hours post dose

Collaborators and Investigators

• Sponsor: GlaxoSmithKline

Publications and helpful links

General Publications

• Yue Y, Collaku A, Brown J, Buchanan WL, Reed K, Cooper SA, Otto J. Efficacy and speed of onset of pain relief of fast-dissolving paracetamol on postsurgical dental pain: two randomized, single-dose, double-blind, placebo-controlled clinical studies. Clin Ther. 2013 Sep;35(9):1306-20. doi: 10.1016/j.clinthera.2013.07.422. Epub 2013 Aug 22.

Study record dates

Study Major Dates

• Study Start: October 1, 2009
• Primary Completion (ACTUAL): March 1, 2010
• Study Completion (ACTUAL): March 1, 2010

Study Registration Dates

• First Submitted: February 18, 2010
• First Submitted That Met QC Criteria: March 4, 2010
• First Posted (ESTIMATE): March 8, 2010

Study Record Updates

• Last Update Posted (ESTIMATE): May 13, 2015
• Last Update Submitted That Met QC Criteria: April 27, 2015
• Last Verified: March 1, 2015

More Information

Terms related to this study

• Keywords: paracetamol; dental pain; Post-surgical dental pain
• Additional Relevant MeSH Terms: Pain; Neurologic Manifestations; Stomatognathic Diseases; Tooth Diseases; Facial Pain; Toothache; Physiological Effects of Drugs; Peripheral Nervous System Agents; Analgesics; Sensory System Agents; Analgesics, Non-Narcotic; Antipyretics; Acetaminophen
• Other Study ID Numbers: A4000684