Effect of Duloxetine on Opioid Use After Total Knee Arthroplasty
Joint Disease, Pain, Acute, Pain, Chronic
About this trial
This is an interventional treatment trial for Joint Disease
Eligibility Criteria
Inclusion Criteria:
- Age 25 to 75 years
- Planned use of regional anesthesia
- Ability to follow study protocol
- English speaking (Primary outcome obtained via telephone call and secondary outcomes include questionnaires validated in English only)
- Patients planning on being discharged home or to a rehabilitation center that has agreed to participate
Exclusion Criteria:
- Current Use of duloxetine or other SNRIs, SSRIs, MAOIs, Tricyclic antidepressants, triptans (sumatriptan, rizatriptan, naratriptan, eletriptan, almotriptan, frovatriptan), lithium, buspirone, St. John's Wort
Hepatic insufficiency
o Hepatoxicity is reported as a side effect of duloxetine. "Median time to detection of transaminase elevation was about two months" (package insert 5.2
Renal insufficiency (ESRD, HD, estimated creatinine clearance < 50 ml/min)
- Severe CRI may impair duloxetine clearance
- CLcr=[(140-age (years)] x weight (kg)x0.85 (for female patients)/[72xserum creatinine (mg/dL)]
- Patients younger than 25 years old and older than 75
- Patients intending to receive general anesthesia
- Allergy or intolerance to one of the study medications
- Patients with an ASA of IV
- Chronic gabapentin/pregabalin use (regular use for longer than 3 months)
- Patients with major prior ipsilateral open knee surgery.
Chronic opioid use (taking opioids for longer than 3 months)
- However, patients using chronic opioids may enroll in a parallel pilot study entitled 'effect of duloxetine on opioid use after total knee athroplasty among patients exposed to opioids- a pilot study'. The chronic opioid users will be allowed to continue their customary analgesics. The pilot study is otherwise identical to the main study.
- This study will enroll up to 15 chronic opioid users. After that, all chronic opioid users are excluded.
Sites / Locations
- Hospital for Special Surgery
Arms of the Study
Arm 1
Arm 2
Experimental
Placebo Comparator
Duloxetine ("Cymbalta")
Placebo
Epidural analgesia after knee arthroplasty is not as prevalent at HSS as formerly, in large part due to the rise of local infiltration analgesia. Studies using epidural analgesia may also lack generalizability given the infrequent use of epidural analgesia at other institutions. For these reasons, we plan to use adductor canal nerve blockade + local infiltration analgesia for management of immediate postoperative pain. Patients will receive spinal anesthesia as the primary anesthetic. It is particularly important to study duloxetine ("Cymbalta") in the context of local infiltration analgesia, as patients receiving local infiltration analgesia receive increased doses of opioids, compared to patients receiving epidural analgesia.
Placebo to compare pain scores and opioid use againts Duloxetine