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Nortriptyline in knee osteoarthritis (NortIKA Study): study protocol for a randomised controlled trial
Ben Hudson1, Jonathan A Williman2, Lisa K Stamp3,4
1Department of General Practice, University of Otago, Christchurch, PO Box 4345, Christchurch, 8140, New Zealand. ben.hudson@otago.ac.nz.
Trials
|October 11, 2015
Summary
This study investigates nortriptyline, a common antidepressant, as a new pain reliever for osteoarthritis. Results could offer a novel treatment for this widespread condition.
Area of Science:
- Orthopedics
- Pain Management
- Pharmacology
Background:
- Osteoarthritis (OA) is a leading cause of chronic pain and disability worldwide.
- Current pain management strategies for OA often provide inadequate relief or carry significant side effect burdens.
- Tricyclic antidepressants, such as nortriptyline, are explored for their potential as centrally-acting analgesics due to their availability and tolerability.
Purpose of the Study:
- To evaluate the efficacy of nortriptyline compared to placebo in managing pain associated with primary knee osteoarthritis.
- To determine if nortriptyline offers a superior analgesic effect for osteoarthritis patients.
Main Methods:
- A randomized, double-blind, placebo-controlled superiority trial design.
- Enrollment of 200 participants diagnosed with primary knee osteoarthritis.
- A 14-week treatment period with study medication, followed by assessment of pain scores using the Western Ontario and McMaster Universities (WOMAC) pain scale.
Main Results:
- This section is not applicable as the abstract describes a study protocol and not results.
Conclusions:
- This protocol outlines the first randomized controlled trial assessing a tricyclic antidepressant for osteoarthritis pain.
- The study's findings are anticipated to significantly impact future clinical management strategies for osteoarthritis.
- This research may introduce a novel therapeutic option for individuals suffering from this prevalent and debilitating condition.

