FAQ: Clinical Trial Results
Trial results are not always publicly available, even after a clinical trial ends. Sometimes, a trial ends before completion, and/or researchers may never publish results. The company that makes the product or sponsored the trial may be the only source of information.
Some sources for finding published trial results are:
- Search for the name of the study or study number by combining (clinicaltrials.gov[si] OR clinical trial[pt]) with the particular disease, condition, or therapy in your search.
- The first part of the search strategy retrieves references from the ClinicalTrials.gov databases.
- The second part of the search strategy retrieves MEDLINE® references identified as reporting on clinical trials.
- Search for the name of the study's principal investigator or collaborators: (disease AND last name [ir]).
- MEDLINE/PubMed has journal article citations and abstracts. Some links to free full-text articles are available. Speak to a local librarian about getting full-text articles through interlibrary loan services if you see no links.
- NIH may write about a trial’s results as NIH News, a Clinical Alert, or an Advisory.
For more information about clinical trials and results, see the following resources:
- ClinicalTrials.gov FAQs from NLM
- Center for Drug Evaluation and Research (CDER) of the US Food and Drug Administration (FDA)