Suzetrigine

Total knee replacements are among the most common and painful orthopedic procedures performed worldwide, often requiring intensive analgesia to support early ambulation and recovery. Despite widespread use of multimodal regimens, many patients still rely on opioids, which can cause sedation, nausea, constipation, and long-term dependency. Evaluating suzetrigine in this high-need population may improve recovery trajectories, reduce opioid consumption, and support enhanced recovery protocols. Given the growing surgical volume and the emphasis on opioid-sparing strategies, rigorous investigation of suzetrigine's efficacy in total knee replacement is of high clinical value. In this confirmatory (phase III) trial, patients undergoing primary total knee replacement will be randomized to receive either suzetrigine or placebo for 2 weeks (14 days), with the loading dose administered prior to surgery. The primary outcome is cumulative 48-hour opioid consumption in oral morphine equivalents starting from entry into the post-anesthesia care unit (PACU).

This research study is being conducted to see whether adding suzetrigine (Journavx), an FDA-approved non-opioid pain medication, to the standard Enhanced Recovery After Surgery (ERAS) pain management protocol can improve pain after surgery. This is to see if we can decrease the use of opioids, since Journavx works on nerve cells outside of the brain to block pain signals and has no addictive potential. Patients will be provided suzetrigine at a pre-operative clinic visit before you come for surgery so they will have it available during your hospital stay. Oral morphine equivalents will be calculated during the inpatient and outpatient duration to assess if individuals who are assigned to the suzetrigine group have decreased use of opioids compared to the non-suzetrigine patient groups. The hypothesis is that suzetrigine will allow for decreased opioid usage.

The goal of this clinical trial is to learn if a non-opioid pain medicine called suzetrigine can lower how much opioid pain medicine adults need after tonsil surgery (tonsillectomy) or a similar throat surgery.

Total hip and knee joint replacements are among the most common and painful orthopedic procedures performed worldwide, often requiring intensive analgesia to support early ambulation and recovery. Despite widespread use of multimodal regimens, many patients still rely on opioids, which can cause sedation, nausea, constipation, and long-term dependency. Evaluating Suzetrigine in this high-need population may improve recovery trajectories, reduce opioid consumption, and support enhanced recovery protocols. Given the growing surgical volume and the emphasis on opioid-sparing strategies, rigorous investigation of Suzetrigine's efficacy in joint replacement is of high clinical value. In this study, patients undergoing primary total hip replacement will be randomized to receive either Suzetrigine or placebo for seven days, with the loading dose administered prior to surgery. The primary outcome is cumulative 48-hour opioid consumption in oral morphine equivalents starting from entry into the post-anesthesia care unit (PACU).