About this trial
The goal of this clinical trial is to learn if a non-opioid pain medicine called suzetrigine works to treat pain after total knee replacement surgery in adults. It will also learn about the safety of suzetrigine. The main questions it aims to answer are:
Does suzetrigine lower the amount of opioid pain medicine participants use after surgery?
Does suzetrigine have any effect on postoperative patient-reported outcomes, including pain scores, range of motion, length of stay, and KOOS/PROMIS surveys?
Researchers will compare suzetrigine to a placebo to see if suzetrigine works to treat pain after total knee replacement surgery.
Participants will:
Take suzetrigine or a placebo by mouth for 14 days after surgery
Receive standard pain care, including opioid pain medicine only if needed
Report their pain levels using short daily surveys
Attend routine follow-up visits after surgery
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Age 18 years or older
Scheduled for elective, unilateral primary total knee arthroplasty
Able to tolerate oral medications after surgery
Disqualifiers
Revision or bilateral total knee arthroplasty
American Society of Anesthesiologists (ASA) physical status classification greater than 3
Severe renal impairment (estimated glomerular filtration rate less than 15 mL/min/1.73 m²)
Severe hepatic impairment (Child-Pugh Class C)
Trial design
Parallel
Treatments tested in this trial
Suzetrigine
DrugSuzetrigine is an oral, non-opioid pain medication that works by blocking specific sodium channels involved in pain signaling. In this study, participants assigned to the suzetrigine group will receive a 100 milligram oral dose in the preoperative area, immediately prior to undergoing the procedure, followed by 50 milligrams taken by mouth twice daily for 14 days after surgery. Suzetrigine will be given in addition to standard postoperative pain care, including acetaminophen, nonsteroidal anti-inflammatory drugs when appropriate, and opioid pain medication only if needed for breakthrough pain.
Placebo
DrugThe placebo is an oral tablet designed to look like the suzetrigine tablet but contains no active drug. In this study, participants assigned to the placebo group will receive a tablet in the preoperative area immediately prior to the procedure, followed by placebo tablets taken by mouth twice daily for 14 days after surgery. The placebo will be given in addition to standard postoperative pain care, including acetaminophen, nonsteroidal anti-inflammatory drugs when appropriate, and opioid pain medication only if needed for breakthrough pain.
Treatment groups
Trial outcomes
Primary outcomes
Opioid Usage
MME of opioid usage
Secondary outcomes
Numeric Pain Rating Scale Scores
Pain will be measured using the Numeric Pain Rating Scale (NPRS), a patient-reported pain scale ranging from 0 to 10, where 0 indicates no pain and 10 indicates the worst pain imaginable. Higher scores indicate worse pain. NPRS scores will be collected daily for the first 14 days after surgery and summarized over the 2-week postoperative period.
Range of Motion
Knee range of motion will be assessed using goniometric measurement of knee flexion, performed by a trained care provider during routine postoperative evaluations. Range of motion reflects the degree of knee movement achieved after surgery. Greater range of motion indicates better functional recovery. Measurements will be obtained at discharge and at the 2-week postoperative visit.
Patient-Reported Outcomes Measurement Information System (PROMIS) Pain Interference Score
Pain-related interference with daily activities will be assessed using the Patient-Reported Outcomes Measurement Information System (PROMIS) Pain Interference questionnaire. This is a standardized patient-reported outcome measure that evaluates the extent to which pain interferes with physical, social, and emotional functioning. Higher scores indicate worse pain interference.
Patient-Reported Outcomes Measurement Information System (PROMIS) Physical Function Score
Physical function will be assessed using the Patient-Reported Outcomes Measurement Information System (PROMIS) Physical Function questionnaire, a validated patient-reported measure of mobility and functional ability. Higher scores indicate better physical function.
Locations
Sponsors and contacts
Click on the lead sponsor to view all of their trials.
AdventHealth
Lead sponsor
American Association of Hip and Knee Surgeons
Collaborator
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