A cited answer
A concise answer in which every sentence carries the NCT numbers or PMIDs behind it.
Clinical trials database built for cited answers across registries
ClinicalEvidence brings registered trials and published studies into one clinical research database and answers your questions from it. Every sentence is cited to an NCT number or PMID, and every matching study appears in a table you can sort, filter and export.
Why one registry is never the whole picture
Trial information is spread across several public sources, each with its own record format, identifiers and update cycle. A trial run in Europe and the United States may sit in more than one registry under different numbers, and its results may be posted in a registry, published in a journal, or both.
- Registry records describe the design, while the outcome often lives in a paper
- Identifiers differ between sources, so the same trial is easy to count twice
- Field names and status categories are not the same from registry to registry
- Exports from each source need cleaning before they can be compared
Building a reliable view by hand means downloading from each source, matching records and checking every row. That is the work ClinicalEvidence does before you ask.
Registries and literature in one clinical research database
Our index combines the public sources professionals already rely on, where licences allow, and is refreshed every day.
- ClinicalTrials.gov, the registry run by the US National Library of Medicine at the National Institutes of Health, with trial records identified by NCT numbers
- The EU Clinical Trials Register, with records identified by EudraCT numbers
- The WHO International Clinical Trials Registry Platform, which brings together records from national and regional registries
- PubMed, with citations and abstracts identified by PMIDs
- The open access subset of PubMed Central, for full text where the licence allows reuse
ClinicalEvidence is an independent tool. It is not affiliated with or endorsed by any of these registries or databases. Read how we work with each one on the ClinicalTrials.gov search, EU Clinical Trial Register and PubMed AI pages.
FDA related trial data in ClinicalTrials.gov
Many professionals look for FDA trial data when what they need is held in ClinicalTrials.gov. Under section 801 of the Food and Drug Administration Amendments Act of 2007 (FDAAA 801), responsible parties for applicable clinical trials of drugs, biological products and devices must register those trials on ClinicalTrials.gov and, in most cases, submit summary results there. That is why results posted on the registry are often the first public place to read outcomes of a trial that supports a US marketing application.
- The trial table shows whether results are posted for each record
- Filter to studies with results available when you need outcomes, not just designs
- Answers cite the registry record and, where one exists, the publication that reported the trial
ClinicalEvidence does not search FDA review documents or labels. It answers from registry records and the published literature, and the "Sources searched" panel tells you exactly which sources were used for each answer.
How ClinicalEvidence answers from the database
You ask a question in plain language. Semantic and full text search find the relevant records across sources, the answer is written only from retrieved passages, and automatic citation verification checks that each cited ID exists in the index and that the passage supports the sentence.
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An answer without verified sources is not shown
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When the index holds no evidence, you are told so plainly, never answered from model memory
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Filters for condition, intervention, phase, status, study type, date range, sponsor type, country and results available
Learn more about cited AI answers.
What each answer shows
A reference list and sources searched
Links to every record and paper, plus a panel listing only the sources actually searched.
A trial table
Phase, population, interventions, primary and secondary endpoints, results posted, sponsor, status, enrolment, dates and locations, ready to export clinical trial data to CSV, XLSX, DOCX, RIS or BibTeX depending on your plan.
Who uses this clinical trials database
- Clinical development teams reviewing competing programmes before a protocol is written
- CRO feasibility leads checking how many trials recruit the same population
- Medical affairs and HEOR teams preparing evidence summaries and dossiers
- Physicians, pharmacists and researchers who need a cited view of the trials behind a question
ClinicalEvidence is a professional research tool. It does not give medical advice and needs no patient data.
Plans for the clinical trials database
Save 50% with yearly billing on every plan.
- Clinician, 49 USD per month or 24 USD per month billed yearly (288 USD)
- Research Team, 199 USD per month or 99 USD per month billed yearly (1 188 USD)
- Organization, 499 USD per month or 249 USD per month billed yearly (2 988 USD)
- Enterprise, 1 490 USD per month or 745 USD per month billed yearly (8 940 USD)
See answers, seats and export formats per plan on the pricing page.
Clinical trials database questions
Which registries does the database include?
ClinicalTrials.gov, the EU Clinical Trials Register and the WHO ICTRP, together with PubMed and the open access subset of PubMed Central, where licences allow. Each answer lists only the sources actually searched.
Does it include trial results required by FDAAA 801?
Results submitted to ClinicalTrials.gov are part of the registry records we index, and the trial table shows whether results are posted for each trial. We do not index FDA review documents or drug labels.
How often is the database updated?
The index is refreshed every day, so new registrations, status changes and newly posted results reach your answers within a day.
Is ClinicalEvidence affiliated with the registries it searches?
No. ClinicalEvidence is an independent tool and is not affiliated with or endorsed by the National Library of Medicine, the NIH, the EMA or the WHO.
Can I export the trial records?
Yes. Every plan exports CSV, RIS and BibTeX, Research Team and higher add XLSX and DOCX with a reference list, and Organization adds bulk CSV export.
Ask the clinical trials database a real question
Try the one-time demo and see a cited answer with its trial table.