Pain pill showdown: ultracet vs. voltaren for back inflammation
NCT ID NCT00766402
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study compared two pain medications—Ultracet (tramadol/acetaminophen) and Voltaren (diclofenac)—in people with ankylosing spondylitis who were already taking disease-modifying anti-rheumatic drugs (DMARDs). The goal was to see which one worked better for pain relief over 8 weeks. Only 8 people enrolled, and the study was terminated early, so the results are limited.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Tramadol/acetaminophen (Ultracet) and diclofenac (Voltaren)
What this could lead to
If successful, this could show that adding a pain reliever like Ultracet helps people with ankylosing spondylitis manage pain better while continuing their regular anti-rheumatic drugs.
What could go wrong
This was a very small, early-terminated Phase 4 study with only 8 participants, so results are not reliable. Pain relief may not differ between the two drugs, and side effects like nausea or dizziness are possible.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Johnson & Johnson Taiwan Ltd.
Taipei, Taiwan