Tapering optimisation with placebo-based mechanisms in rheumatoid arthritis: the TOP-RA trial

Rheumatoid arthritis is a long-term condition that causes pain, swelling, and stiffness in the joints. Many people manage their symptoms well using advanced medicines called biologic treatments, which are usually given as regular injections. When arthritis has been quiet and stable for a long time, doctors often suggest 'tapering'—gradually spacing out injections to find the lowest effective dose. Lowering the dose can reduce the risk of side effects and cut down on regular injections.

However, tapering can be stressful. Expecting pain to return can sometimes cause symptoms to flare up. Scientists know our bodies can learn to connect healing with certain routines or sensory cues, such as a particular scent. This is known as conditioning. In the TOP-RA study, researchers want to see if combining standard dose reduction with psychological support—specifically training your expectations and using a unique scent cue—can help your body adapt to receiving less medication.

During the trial, participants will be guided through careful, step-by-step increases in the time between their injections. Some people will receive standard medical care alone, while others will also receive expectation training, either on its own or paired with a scent cue. The team will monitor everyone closely to see who can successfully keep their injections spaced out over nine to fifteen months.

This research matters because finding safe, drug-free ways to support medication reduction could give people with arthritis more confidence and control over their treatment. If successful, these simple techniques could become a standard part of arthritis care, helping patients maintain good health with fewer injections.