CTRI Registration in India: A Practical Guide for Sponsors and CROs

Registering a trial with the Clinical Trials Registry – India (CTRI) is a legal requirement for most clinical trials run in India, and journals and ethics committees check the record. This guide explains, step by step, how registration works on the official CTRI website, what to prepare, and the questions Indian sponsors, CROs and investigators ask most often.

Clinical Trials (clinicalstrials.com) is an independent information and recruitment platform. We are not the Clinical Trials Registry – India, we are not part of ICMR or CDSCO, and we cannot register a trial, issue a CTRI number or change a registry record for you. Official registration is done only on the CTRI website at ctri.nic.in. Always check current rules on the official sources listed at the end of this article.

The CTRI is a free, online public registry for clinical studies conducted in India. It is hosted by the Indian Council of Medical Research (ICMR) through its National Institute for Research in Digital Health and Data Science (formerly the National Institute of Medical Statistics). The CTRI is a Primary Registry in the World Health Organization's International Clinical Trials Registry Platform (ICTRP), so its records are also searchable through the WHO portal.

Yes, for clinical trials. Registration with the CTRI has been mandatory since 15 June 2009 following a direction from the Drugs Controller General of India. The New Drugs and Clinical Trials Rules, 2019 require that a clinical trial is registered with the CTRI before the first participant is enrolled. The ICMR National Ethical Guidelines for Biomedical and Health Research Involving Human Participants (2017) also expect prospective registration of trials, including academic and investigator-initiated studies.

Gather these documents first, because the online form asks for details from each of them: the final protocol with version number and date; ethics committee approval letters for every site; the CDSCO/DCGI permission where the trial needs regulatory approval; principal investigator details for each site; sponsor and, where used, CRO details; inclusion and exclusion criteria exactly as written in the protocol; primary and secondary outcomes with timepoints; and the target sample size and expected date of first enrolment.

Step 1 – Create a registrant account. On the CTRI website, register as a new user with an email address. The registrant is usually the principal investigator, the sponsor, or someone authorised by them, such as a CRO.

Step 2 – Start a new trial record. After logging in, open a new registration and complete the trial data set. Many fields follow the WHO Trial Registration Data Set: public and scientific titles, design, conditions, interventions, outcomes and recruitment status.

Step 3 – Save as you go. The form is long. Save regularly, check every field against the protocol, and keep titles identical across the protocol, ethics approvals and registry record.

Step 4 – Submit and note your reference number. On submission the system issues a provisional reference number. Keep it for all correspondence.

Step 5 – Answer editorial queries. CTRI staff review the submission and may raise queries. Reply through your account and resubmit. Unclear outcomes or missing ethics details are frequent causes of queries.

Step 6 – Receive the CTRI number. Once accepted, the trial gets a permanent number in the format CTRI/year/month/serial number. Use it in consent documents, publications and correspondence.

Step 7 – Keep the record updated. Update recruitment status, sites, enrolment dates and other changes during the trial, and complete the record when the study ends.

A trial registered before the first participant is enrolled is prospectively registered. A trial registered after enrolment began is marked as retrospectively registered. Regulated clinical trials must be registered before enrolment under the 2019 Rules, and many journals will not publish trials that were not prospectively registered.

Does CTRI registration cost anything? No. Registration on the CTRI is free.

Who should register the trial? The sponsor or principal investigator is responsible. A CRO may complete registration on the sponsor's behalf, but responsibility for accuracy stays with the sponsor and investigator.

Do BA/BE studies need CTRI registration? Bioavailability and bioequivalence studies are covered by the 2019 Rules and CDSCO has issued notices on their registration. Check current CDSCO requirements for your specific study before enrolling volunteers.

Do academic or thesis studies need registration? The ICMR ethical guidelines expect registration of clinical trials, including investigator-initiated and postgraduate studies. Ethics committees usually ask for the CTRI number.

Does registration replace ethics or CDSCO approval? No. Registration is separate; ethics committee approval and, where applicable, CDSCO permission are still required.

How long does it take? It depends on the quality of the submission and the number of editorial queries. Submit well before planned first enrolment.

How can volunteers check a trial? Anyone can search the CTRI website by CTRI number, condition, sponsor or location. Volunteers should ask the study team for the CTRI number and check it on ctri.nic.in before agreeing to take part.

Different titles across the protocol, ethics approval and registry form; missing or expired ethics committee details; outcome measures paraphrased instead of copied from the protocol; changing sponsor contacts mid-registration; and starting registration only days before enrolment.

Once a trial is registered and approved, CROs can list open studies on Clinical Trials to reach volunteers, and volunteers can track their applications here. The CTRI number remains the official registry reference; our listings do not replace it.