Post Operative PainPhase 4NCT07571252
Impact of Preemptive Analgesia on Postoperative Pain in Orthognathic Surgery
A Phase 4 study testing Acetaminophen and ibuprofen in people with Post Operative Pain and Orthognathic Surgery, run by University of Puerto Rico at 1 site in Puerto Rico.
Trial summary
This randomized controlled clinical trial evaluates the effect of preemptive analgesia on postoperative pain outcomes in adult patients undergoing orthognathic surgery. Participants scheduled for bilateral sagittal split osteotomy and Le Fort I osteotomy under general anesthesia will be randomized to one of three… Read more about this study
- Who is it for?
- Ages 21 to 65 years
- Conditions the study is for
- Post Operative Pain, Orthognathic Surgery
- What is being tested?
- Acetaminophen and ibuprofen
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 72 participants
- Where
- 1 sitePuerto Rico
- Study dates
- Sep 2026to Feb 2027
- Phase
- Phase 4
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 21 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Adults aged 21 to 65 years.
- American Society of Anesthesiologists (ASA) physical status I or II.
- Scheduled to undergo orthognathic surgery including bilateral sagittal split osteotomy and Le Fort I osteotomy under general anesthesia.
- Ability to understand the study procedures and provide written informed consent.
Who cannot join
- Pregnancy or breastfeeding.
- Known allergy or intolerance to acetaminophen, ibuprofen, or other nonsteroidal anti-inflammatory drugs (NSAIDs).
- Renal dysfunction, defined as estimated glomerular filtration rate <60 mL/min/1.73 m².
- Hepatic dysfunction, defined as liver enzyme levels greater than twice the upper limit of normal.
- History of bleeding disorders or coagulopathy.
- Active or recent peptic ulcer disease.
- Current use of recreational drugs, including cannabis, that in the judgment of the investigators could interfere with anesthesia management, postoperative pain assessment, or study outcomes.
- Any medical condition that, in the judgment of the investigators, would make participation unsafe or interfere with study participation.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Puerto Rico1 site, 1 recruiting
- Recruiting
Administración de Servicios Médicos (ASEM)
San Juan, 00936
Dennys Rivera Pérez, MD, 7877582525 ext. 1920-1921, dennys.rivera@upr.edu
Alvara J Horta Caicedo, DMD, 1-678-394-7721, alvaro.horta@upr.edu
About this study
Official title: Impact of Preemptive Analgesia on Postoperative Pain in Patients Undergoing Orthognathic Surgery: A Randomized Controlled Trial.
This randomized controlled clinical trial evaluates the effect of preemptive analgesia on postoperative pain outcomes in adult patients undergoing orthognathic surgery. Participants scheduled for bilateral sagittal split osteotomy and Le Fort I osteotomy under general anesthesia will be randomized to one of three groups: intravenous acetaminophen, intravenous ibuprofen, or a control group receiving standard postoperative analgesia without preoperative medication.
The study aims to determine whether the administration of pre-surgical analgesics reduces postoperative pain intensity and analgesic requirements during the early postoperative period. Pain will be assessed using a standardized pain scale at multiple time points following surgery, and secondary outcomes will include postoperative analgesic consumption and patient satisfaction with pain control.
This investigation seeks to contribute evidence supporting multimodal analgesic strategies and improved postoperative pain management in patients undergoing orthognathic surgery.
Read the detailed description
Effective management of postoperative pain remains an important component of perioperative care in patients undergoing orthognathic surgery. Procedures such as bilateral sagittal split osteotomy and Le Fort I osteotomy are associated with significant postoperative discomfort due to extensive manipulation of osseous and soft tissue structures. Preemptive analgesia, defined as the administration of analgesic medication prior to surgical injury, has been proposed as a strategy to attenuate central sensitization and reduce postoperative pain intensity.
This study is designed as a participant-blinded, randomized controlled clinical trial conducted in the operating room at the Administration of Medical Services in Puerto Rico (ASEM). Adult patients between 21 and 65 years of age with American Society of Anesthesiologists (ASA) physical status I or II who are scheduled to undergo orthognathic surgery will be invited to participate following informed consent. A total of 72 participants will be enrolled and randomly assigned in a 1:1:1 ratio to one of three groups: intravenous acetaminophen, intravenous ibuprofen, or a control group receiving no preoperative analgesic intervention.
Participants in the intervention groups will receive either acetaminophen 1 g intravenously or ibuprofen 600 mg intravenously approximately 30 minutes before surgical incision, with a second dose administered near the end of the procedure according to the medication half-life. The control group will receive no pre-surgical analgesic administration and will follow the institution's standard postoperative pain management protocol.
Postoperative pain intensity will be measured using a validated pain scale at predetermined intervals during the postoperative period. Additional outcomes include postoperative analgesic requirements and patient satisfaction with pain control. By comparing two commonly used intravenous analgesic medications with standard care, this study aims to evaluate the effectiveness of preemptive analgesic strategies in improving postoperative pain outcomes and reducing analgesic consumption following orthognathic surgery.
- Conditions
- Post Operative Pain, Orthognathic Surgery
- Being tested
- Acetaminophen, ibuprofen
- Keywords
- Preemptive Analgesia, Orthognathic Surgery, Postoperative Pain, Maxillofacial Surgery, Multimodal Analgesia, Randomized controlled trial
- Medical subject headings
- Pain, Postoperative
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
AcetaminophenDrug
Also called Acetaminophen 1g Iv, Acetaminophen 1000mg IV
Acetaminophen 1 g administered intravenously approximately 30 minutes prior to surgical incision during orthognathic surgery under general anesthesia. A second dose will be administered near the end of the surgical procedure according to the medication half-life.
ibuprofenDrug
Also called Ibuprofen 600mg IV
Ibuprofen 600 mg administered intravenously approximately 30 minutes prior to surgical incision during orthognathic surgery under general anesthesia. A second dose will be administered near the end of the surgical procedure according to the medication half-life.
| Study group | Role | What they receive |
|---|---|---|
| Intravenous Acetaminophen | Experimental | Participants randomized to this arm will receive acetaminophen 1 g administered intravenously approximately 30 minutes prior to surgical incision during orthognathic surgery under general anesthesia. A second dose will be administered near the end of the surgical procedure according to the medication half-life. Postoperative pain outcomes will be compared with the other study groups. Receives: Drug: Acetaminophen |
| Intravenous Ibuprofen | Experimental | Participants randomized to this arm will receive ibuprofen 600 mg administered intravenously approximately 30 minutes prior to surgical incision during orthognathic surgery under general anesthesia. A second dose will be administered near the end of the procedure according to the medication half-life. Postoperative pain outcomes will be compared with the other study groups. Receives: Drug: ibuprofen |
| Standard Care Control | No intervention | Participants randomized to this arm will not receive preoperative analgesic medication. Postoperative pain management will follow the institution's standard care protocol after completion of the surgical procedure. Outcomes will be compared with participants receiving preemptive intravenous analgesic interventions. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Postoperative Pain Intensity
Postoperative pain intensity measured using a validated pain scale (Visual Analog Scale, 0-10) in patients undergoing orthognathic surgery. Pain scores will be recorded and compared between the acetaminophen, ibuprofen, and control groups.
Measured: 1 hour, 4 hours, and 24 hours after surgery
Secondary outcomes (2)
Postoperative Analgesic Consumption
Total amount of rescue analgesic medications administered during the postoperative period will be recorded and compared between study groups.
Measured: Within 24 hours after surgery
Patient Satisfaction with Pain Management
Patient satisfaction with postoperative pain control measured using the Spanish version of the Pain Treatment Satisfaction Scale (PTSS).
Measured: 24 hours after surgery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 May 2026
- Study startSep 2026 (estimated)
- Primary completionDec 2026 (estimated)
- Study completionFeb 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for Post Operative PainStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Participants will be randomized in a 1:1:1 ratio to receive intravenous acetaminophen, intravenous ibuprofen, or no preoperative analgesia prior to orthognathic surgery. Postoperative pain outcomes will be compared between the three groups.
- Masking
- Triple blind
- Who is masked
- Participant, Investigator, Outcomes assessor
- Enrolment
- 72 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University of Puerto Rico
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Hector Torres Pérez, University of Puerto Rico
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07571252
- Sponsor's protocol ID
- 2603555595
- Status last verified
- Aug 2026
- First submitted
- 29 Apr 2026
- Last updated
- 1 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No: Individual participant data will not be shared because the dataset contains potentially identifiable health information and the study protocol does not include provisions for external data sharing.
Publications
Cillo JE Jr, Dattilo DJ. Pre-emptive analgesia with pregabalin and celecoxib decreases postsurgical pain following maxillomandibular advancement surgery: a randomized controlled clinical trial. J Oral Maxillofac Surg. 2014 Oct;72(10):1909-14. doi: 10.1016/j.joms.2014.05.014. Epub 2014 May 27.
PubMed 25234526Alyahya A, Aldubayan A, Swennen GRJ, Al-Moraissi E. Effectiveness of different protocols to reduce postoperative pain following orthognathic surgery: A systematic review and meta-analysis. Br J Oral Maxillofac Surg. 2022 Sep;60(7):e1-e10. doi: 10.1016/j.bjoms.2022.03.013. Epub 2022 Apr 23.
PubMed 35690502Xuan C, Yan W, Wang D, Li C, Ma H, Mueller A, Chin V, Houle TT, Wang J. Efficacy of preemptive analgesia treatments for the management of postoperative pain: a network meta-analysis. Br J Anaesth. 2022 Dec;129(6):946-958. doi: 10.1016/j.bja.2022.08.038. Epub 2022 Oct 26.
PubMed 36404458
Study at a glance
From the registry record, last updated by the sponsor on 1 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Impact of Preemptive Analgesia on Postoperative Pain in Patients Undergoing Orthognathic Surgery: A Randomized Controlled Trial.
- ClinicalTrials.gov ID
- NCT07571252
- Acronym / sponsor ID
- 2603555595
- Conditions
- Post Operative Pain, Orthognathic Surgery
- Keywords
- Preemptive Analgesia, Orthognathic Surgery, Postoperative Pain, Maxillofacial Surgery, Multimodal Analgesia, Randomized controlled trial
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 72 participants (estimated)
- Lead sponsor
- University of Puerto RicoUniversity, hospital or other
- Study start
- Sep 2026 (estimated)
- Primary completion
- Dec 2026 (estimated)
- Study completion
- Feb 2027 (estimated)
- First posted
- 6 May 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This randomized controlled clinical trial evaluates the effect of preemptive analgesia on postoperative pain outcomes in adult patients undergoing orthognathic surgery. Participants scheduled for bilateral sagittal split osteotomy and Le Fort I osteotomy under general anesthesia will be randomized to one of three groups: intravenous acetaminophen, intravenous ibuprofen, or a control group receiving standard postoperative analgesia without preoperative medication.
The study aims to determine whether the administration of pre-surgical analgesics reduces postoperative pain intensity and analgesic requirements during the early postoperative period. Pain will be assessed using a standardized pain scale at multiple time points following surgery, and secondary outcomes will include postoperative analgesic consumption and patient satisfaction with pain control.
This investigation seeks to contribute evidence supporting multimodal analgesic strategies and improved postoperative pain management in patients undergoing orthognathic surgery.
Detailed description
Effective management of postoperative pain remains an important component of perioperative care in patients undergoing orthognathic surgery. Procedures such as bilateral sagittal split osteotomy and Le Fort I osteotomy are associated with significant postoperative discomfort due to extensive manipulation of osseous and soft tissue structures. Preemptive analgesia, defined as the administration of analgesic medication prior to surgical injury, has been proposed as a strategy to attenuate central sensitization and reduce postoperative pain intensity.
This study is designed as a participant-blinded, randomized controlled clinical trial conducted in the operating room at the Administration of Medical Services in Puerto Rico (ASEM). Adult patients between 21 and 65 years of age with American Society of Anesthesiologists (ASA) physical status I or II who are scheduled to undergo orthognathic surgery will be invited to participate following informed consent. A total of 72 participants will be enrolled and randomly assigned in a 1:1:1 ratio to one of three groups: intravenous acetaminophen, intravenous ibuprofen, or a control group receiving no preoperative analgesic intervention.
Participants in the intervention groups will receive either acetaminophen 1 g intravenously or ibuprofen 600 mg intravenously approximately 30 minutes before surgical incision, with a second dose administered near the end of the procedure according to the medication half-life. The control group will receive no pre-surgical analgesic administration and will follow the institution's standard postoperative pain management protocol.
Postoperative pain intensity will be measured using a validated pain scale at predetermined intervals during the postoperative period. Additional outcomes include postoperative analgesic requirements and patient satisfaction with pain control. By comparing two commonly used intravenous analgesic medications with standard care, this study aims to evaluate the effectiveness of preemptive analgesic strategies in improving postoperative pain outcomes and reducing analgesic consumption following orthognathic surgery.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind (participant, investigator, outcomes assessor)
- Number of arms
- 3
- Model description
- Participants will be randomized in a 1:1:1 ratio to receive intravenous acetaminophen, intravenous ibuprofen, or no preoperative analgesia prior to orthognathic surgery. Postoperative pain outcomes will be compared between the three groups.
| Arm | Type | Receives |
|---|---|---|
| Intravenous Acetaminophen | Experimental | Drug: AcetaminophenParticipants randomized to this arm will receive acetaminophen 1 g administered intravenously approximately 30 minutes prior to surgical incision during orthognathic surgery under general anesthesia. A second dose will be administered near the end of the surgical procedure according to the medication half-life. Postoperative pain outcomes will be compared with the other study groups. |
| Intravenous Ibuprofen | Experimental | Drug: ibuprofenParticipants randomized to this arm will receive ibuprofen 600 mg administered intravenously approximately 30 minutes prior to surgical incision during orthognathic surgery under general anesthesia. A second dose will be administered near the end of the procedure according to the medication half-life. Postoperative pain outcomes will be compared with the other study groups. |
| Standard Care Control | No intervention | –Participants randomized to this arm will not receive preoperative analgesic medication. Postoperative pain management will follow the institution's standard care protocol after completion of the surgical procedure. Outcomes will be compared with participants receiving preemptive intravenous analgesic interventions. |
Who may qualify
- Ages
- 21 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Adults aged 21 to 65 years.
- American Society of Anesthesiologists (ASA) physical status I or II.
- Scheduled to undergo orthognathic surgery including bilateral sagittal split osteotomy and Le Fort I osteotomy under general anesthesia.
- Ability to understand the study procedures and provide written informed consent.
Key exclusion criteria (8 listed)
- Pregnancy or breastfeeding.
- Known allergy or intolerance to acetaminophen, ibuprofen, or other nonsteroidal anti-inflammatory drugs (NSAIDs).
- Renal dysfunction, defined as estimated glomerular filtration rate <60 mL/min/1.73 m².
- Hepatic dysfunction, defined as liver enzyme levels greater than twice the upper limit of normal.
- History of bleeding disorders or coagulopathy.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| AcetaminophenAlso: Acetaminophen 1g Iv, Acetaminophen 1000mg IVAcetaminophen 1 g administered intravenously approximately 30 minutes prior to surgical incision during orthognathic surgery under general anesthesia. A second dose will be administered near the end of the surgical procedure according to the medication half-life. | Drug | Intravenous Acetaminophen |
| ibuprofenAlso: Ibuprofen 600mg IVIbuprofen 600 mg administered intravenously approximately 30 minutes prior to surgical incision during orthognathic surgery under general anesthesia. A second dose will be administered near the end of the surgical procedure according to the medication half-life. | Drug | Intravenous Ibuprofen |
Primary outcome
Postoperative Pain Intensity
Time frame: 1 hour, 4 hours, and 24 hours after surgery
Postoperative pain intensity measured using a validated pain scale (Visual Analog Scale, 0-10) in patients undergoing orthognathic surgery. Pain scores will be recorded and compared between the acetaminophen, ibuprofen, and control groups.
2 secondary outcomes
Postoperative Analgesic Consumption
Time frame: Within 24 hours after surgery
Patient Satisfaction with Pain Management
Time frame: 24 hours after surgery
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 1 Sep 2026.
- Background: PubMed 25234526Cillo JE Jr, Dattilo DJ. Pre-emptive analgesia with pregabalin and celecoxib decreases postsurgical pain following maxillomandibular advancement surgery: a randomized controlled clinical trial. J Oral Maxillofac Surg. 2014 Oct;72(10):1909-14. doi: 10.1016/j.joms.2014.05.014. Epub 2014 May 27.
- Background: PubMed 35690502Alyahya A, Aldubayan A, Swennen GRJ, Al-Moraissi E. Effectiveness of different protocols to reduce postoperative pain following orthognathic surgery: A systematic review and meta-analysis. Br J Oral Maxillofac Surg. 2022 Sep;60(7):e1-e10. doi: 10.1016/j.bjoms.2022.03.013. Epub 2022 Apr 23.
- Background: PubMed 36404458Xuan C, Yan W, Wang D, Li C, Ma H, Mueller A, Chin V, Houle TT, Wang J. Efficacy of preemptive analgesia treatments for the management of postoperative pain: a network meta-analysis. Br J Anaesth. 2022 Dec;129(6):946-958. doi: 10.1016/j.bja.2022.08.038. Epub 2022 Oct 26.
- Individual participant dataSharing planned: No. Individual participant data will not be shared because the dataset contains potentially identifiable health information and the study protocol does not include provisions for external data sharing.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Acetaminophen and ibuprofen in people with Post Operative Pain and Orthognathic Surgery, run by University of Puerto Rico at 1 site in Puerto Rico.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 1 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Puerto Rico. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Dennys Rivera Pérez, MD (7877582525 ext. 1920-1921, dennys.rivera@upr.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Postoperative Pain Intensity (time frame: 1 hour, 4 hours, and 24 hours after surgery). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07571252, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 1 Sep 2026.