New knee shot aims to ease arthritis pain – early trial underway
NCT ID NCT06989645
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This early-phase trial tested a single injection of SYN321, a drug that breaks down into pain-relieving substances, in 35 people with painful knee osteoarthritis. The main goal was to check safety and tolerability at three different doses compared to a placebo injection. Researchers also looked at how the drug moves through the body and whether it offers any pain relief, but the study was too small to draw firm conclusions about effectiveness.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
SYN321 (a drug that breaks down into diclofenac and diclofenac lactam)
What this could lead to
If it works, this could point toward a single-injection treatment to ease knee osteoarthritis pain for weeks or months.
What could go wrong
This is a very early, small trial (35 people) focused on safety, not proof of effectiveness. The drug may not reduce pain better than placebo, and side effects are still being identified.
Disclaimer
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This is a summary of
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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Cinical Trial Consultants AB
Uppsala, Sweden