This registry can be searched here and is also searchable under the International Clinical Trials Registry Platform Search Portal (WHO).
There are 35,334 trials registered on this resource (13 April 2023).
Results will be recorded in registry records when provided and links to trial documents can be included.
Publications relating to IRCT include:
Lotfi S, Janani L, Ghalichi L, Tanha K, Solaymani-Dodaran M. Scientometric measures of prospectively registered clinical trials over time: A comparison of IRCT and ClinicalTrials.gov. Med J Islam Repub Iran. 2020;34:116.
Default operator AND
Boolean operators AND, OR
Phrase searching "breast cancer"
Nesting Yes
Truncation *
Field tags It is possible to conduct searches in many individual fields using the Advanced Search option
Hyphens Hyphens seem to be ignored, so search as phrases
Help pages Yes
Example (cancer* OR neoplasms) AND pain*
Saved searches No
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Updated 13 October 2025