Clinical Trials Registers, Databases and Portals
This page lists national and international registers, and portals, and provides information on the basics of searching each site.
AdisInsight (basic information is free; full information available with subscription or pay-per-item)
Australian New Zealand Clinical Trials Registry (also searchable under the ICTRP search portal)
Be Part of Research (UK Clinical Trials)
Brazilian Clinical Trials Registry / Registro Brasileiro de Ensaios Clinicos (ReBEC) (also searchable under the ICTRP search portal)
Chinese Clinical Trial Registry (ChiCTR) (also searchable under the ICTRP search portal)
Clinical Trials Database (Canada)
ClinicalTrials.gov (also searchable under the ICTRP search portal)
Cuban Public Registry of Clinical Trials / Registro Público Cubano de Ensayos Clínicos (RPCEC) (also searchable under the ICTRP search portal)
Dutch Trial Register (also searchable under the ICTRP search portal)
European Union trials registers including the Clinical Trials Information Service (CTIS) and EU-CTR. EU-CTR is also searchable under the ICTRP search portal)
EU-CTR EU-CTR is also searchable under the ICTRP search portal)
German Clinical Trials Register (DRKS) (also searchable under the ICTRP search portal)
HERDIN (The Philippine Health Research Registry)
India: Clinical Trials Registry India (also searchable under the ICTRP search portal)
International Clinical Trials Registry Platform (ICTRP) (World Health Organization)
Iranian Registry of Clinical Trials (IRCT) (also searchable under the ICTRP search portal)
ISRCTN (also searchable under the ICTRP search portal)
Japan: University Hospital Medical Information Network Clinical Trials Registry (for Japan) (UMIN)
Japan Primary Registries Network (also searchable under the ICTRP search portal)
Korea (Republic of) Clinical Research Information Service (CRiS) (also searchable under the ICTRP search portal)
Medline Databank Sources (provides access to a number of clinical trial registers)
Pan African Clinical Trials Registry (PACTR)(also searchable under the ICTRP search portal)
Peruvian Clinical Trials Registry (searchable under the ICTRP search portal)
PharmNet Bund (Clinical trials) (also searchable under EU Clinical Trials Register)
Sri Lanka Clinical Trials Registry (SLCTR) (also searchable under the ICTRP search portal)
Thai Clinical Trials Registry (TCTR) (also searchable under the ICTRP search portal)
Pharmaceutical and device industry registers
Disease and other specific trials registers
There are many COVID-19 trial register collections. Some are listed here.
There are many disease specific trials registers particularly in the field of cancer. Examples include:
Experimental Cancer Trial Finder (EC Trial Finder) - clinical trial database to identiyf early phase oncology trials within the UK Experimental Cancer Medicine Centres network
Cancer Trials Victoria (Cancer Council Victoria and Victorian Cooperative Oncology Group)
Arbeitsgemeinschaft Urologische Onkologie e.V (A subsection of the German Cancer Society)
See also the Section Research Registers
Closed databases
ABPI (2009)
metaRegister of RCTs
ALOIS
If you would like to suggest registers to add to this resource please send the details to Julie Glanville.
Updated 20 October 2023