New arthritis drug put to the sun safety test
NCT ID NCT05844735
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This study tested whether the experimental drug SAR441566, being developed for rheumatoid arthritis, makes skin more sensitive to ultraviolet (UV) light. Sixty healthy adults aged 18 to 55 received either the drug, a placebo, or ciprofloxacin (a known sun-sensitizer). Researchers measured skin redness after UV exposure to see if the drug increases sunburn risk. The results will help determine if the drug is safe to use without extra sun precautions.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
SAR441566
What this could lead to
If successful, this study could show that SAR441566 is safe to use without extra sun sensitivity, supporting its further development for rheumatoid arthritis.
What could go wrong
This is an early Phase 1 study in only 60 healthy people, not patients. It only tests sun sensitivity, not whether the drug works for arthritis. The drug may still fail in later trials.
Disclaimer
Read more
Show less
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.
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.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for RHEUMATOID ARTHRITIS are added.
By submitting, you agree to our Terms of use
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
Show contact details
Enter your email to view the contact information for this study.
By submitting, you agree to our Terms of use
Locations
-
TKL Research, Inc. Site Number : 8400001
Fair Lawn, New Jersey, 07410, United States