Services›ClinicalTrials.gov

ClinicalTrials.gov

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US NIH database of clinical studies and trials for conditions worldwide, allowing patients to find trials, researchers to register studies, and professionals to access results.

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https://clinicaltrials.govNo auth requiredhealthdataconfidence: 90/1000 discoveries1 contributors

GET/api/v2/studies

Search clinical trials by condition, drug, or location

Parameters

pageSizeintegeroptional

query.condmedical condition (stringoptional

query.intrintervention or drug (stringoptional

query.locnlocation (stringoptional

query.phasePHASE1|PHASE2|PHASE3 (stringoptional

filter.overall-statusRECRUITING|ACTIVE_NOT_RECRUITING|COMPLETED (stringoptional

Returns

studies[] with nctId, title, status, phase, condition, intervention, locations[], start_date, completion_date

GET/api/v2/studies/{nctId}

Get detailed study protocol and results

Returns

study with protocol{} including eligibility, outcomes, sponsors, results{} with outcome_measures, adverse_events

GET/api/v2/studies/{nctId}/study-fields

Get published results for a completed trial

Parameters

fieldsResultsSectionoptional— AnnotationSection (string

Returns

results with primary_outcomes[], adverse_events{}, baseline_characteristics