Registered and ongoing trials

This site lists published studies. Trials that are registered but not yet reported live in the public registries. The links below run a live search on each one, so the list stays current without this page changing.

Search the registries

• ClinicalTrials.gov: palmitoylethanolamide (United States registry, used worldwide)
• ANZCTR: palmitoylethanolamide (Australia and New Zealand)
• EU Clinical Trials Register
• WHO ICTRP searches most national registries at once. Type palmitoylethanolamide in the search box.

Registry entries describe a plan, not a result. A trial listed as completed may never publish.

Registrations behind trials on this site

Where a published paper names its registration, the study page here records it in the limits. A registration made before the trial started is a mark of quality: the outcomes were fixed in advance. Examples in the database:

• Rao 2025, menstrual pain: NCT05810116.
• Versace 2023, long COVID: NCT05311852, registered after the study began.
• Taye 2026, osteoarthritis: ACTRN12621000039886.
• Gagliano 2011, glaucoma: UMIN000002833.
• Narayanaswam 2023, arthritis: CTRI/2022/10/046693.
• Strobbe 2013, ocular hypertension: ISRCTN72647928.

Many of the older Italian trials name no registration. Their pages say so.

What to look for in a registry entry

1. The date it was registered, against the date recruitment started.
2. The primary outcome. If the published paper reports a different one, ask why.
3. The planned sample size, against the number in the paper.
4. Who is sponsoring it. Company sponsored trials are the norm for this molecule; see researchers, companies and funding.

When a registered trial publishes, it is added to the research log and the database.