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Trackers› Clinical trials› Istanbul
Clinical trial register · Turkey

Clinical Trials in Istanbul, 2026

Every study on the ClinicalTrials.gov registry that lists a site in Turkey and is open, about to open, active-but-closed, or enrolling by invitation. Filter it, cite it, and take it away as a file.

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Source: ClinicalTrials.gov, U.S. National Library of Medicine. Complete coverage — all 5418 matching records held by the registry are in this view. Synced 11 Oct 2026, 03:18 UTC
5418
Studies in scope
all four open statuses
2461
Recruiting now
open to new participants
548
Lead sponsors
across recruiting studies
Top sites
Ankara 91 Istanbul 69 Adana 42 Izmir 32 Bornova 20
Narrow the registerReset
Recruitment status
Phase
Lead sponsor
Istanbul University - Cerrahpasa135 Marmara University100 AstraZeneca81 Merck Sharp & Dohme LLC69 Medipol University68 Clear sponsor filter
Site location
Ankara91 Istanbul69 Adana42 Izmir32 Bornova20
All 43 locations
Target enrolment
to

Trials with a site in Istanbul

69 of 5418 studies
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Status
Study
Lead sponsor
Phase
Enrol
Sites in Turkey
Start
Recruiting
Merck Sharp & Dohme LLC
Phase 2/3
960
Ankara, Istanbul, Samsun
2026-06-22
Recruiting
Merck Sharp & Dohme LLC
Phase 3
876
Adana, Ankara, Istanbul, Izmir, Kayseri
2026-05-04
Recruiting
A Clinical Study of MK-1045 in People With Non-Hodgkin Lymphoma (MK-1045-008)
NCT07519772Lymphoma, Non-Hodgkin, Lymphoma, Follicular, Lymphoma, Large B-Cell, Diffuse
DrugMK-1045
Merck Sharp & Dohme LLC
Phase 1/2
280
Ankara, Antalya, Istanbul, Samsun
2026-05-03
Recruiting
Merck Sharp & Dohme LLC
Phase 3
758
Sıhhiye, Adana, Ankara, Edirne, Istanbul, Izmir
2026-04-09
Recruiting
Merck Sharp & Dohme LLC
Phase 3
400
Adana, Ankara, Istanbul, Malatya, Mersin, Rize, Sakarya
2026-03-18
Recruiting
Merck Sharp & Dohme LLC
Phase 2
180
Ankara, Istanbul
2025-12-12
Recruiting
A Clinical Study of MK-3120 in People With Bladder Cancer (MK-3120-003)
NCT07222488Bladder Cancer, Urinary Bladder Neoplasms
DrugMK-3120
Merck Sharp & Dohme LLC
Phase 1/2
45
Ankara, Istanbul
2025-12-09
Recruiting
Merck Sharp & Dohme LLC
Phase 2
150
Adana, Ankara, Istanbul
2025-12-04
Active, closed
Merck Sharp & Dohme LLC
Phase 3
996
Sıhhiye, Ankara, Eskişehir, Istanbul, Kayseri, Malatya
2025-11-11
Recruiting
Merck Sharp & Dohme LLC
Phase 3
675
Seyhan, Altindağ, Ankara, Edirne, Istanbul
2025-10-08
Recruiting
Merck Sharp & Dohme LLC
Phase 2
315
Fatih, Ankara, Istanbul, Kocaeli, Konya
2025-09-26
Recruiting
Merck Sharp & Dohme LLC
Phase 2
250
Adana, Ankara, Edirne, Istanbul
2025-08-11
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,000
Adana, Ankara, Diyarbakır, Istanbul, Mersin, Rize, Samsun
2025-07-21
Recruiting
Merck Sharp & Dohme LLC
Phase 3
477
Sıhhiye, Adana, Ankara, Diyarbakır, Istanbul, Izmir
2025-07-16
Recruiting
Merck Sharp & Dohme LLC
Phase 1/2
360
Adana, Ankara, Istanbul, Rize
2025-07-03
Recruiting
A Clinical Study of Sacituzumab Tirumotecan (Sac-TMT, MK-2870) in People With Breast Cancer (MK-2870-032)
NCT06966700Breast Neoplasms, Triple Negative Breast Neoplasms, HR Low-Positive/HER2-Negative Breast Neoplasms
DrugsEpirubicin·Adriamycin·Xeloda·Sacituzumab tirumotecan
Merck Sharp & Dohme LLC
Phase 3
2,400
Sıhhiye, Adana, Ankara, Istanbul, Kayseri, Mersin, Samsun
2025-06-30
Recruiting
Merck Sharp & Dohme LLC
Phase 2
144
Izmir, Adana, Ankara, Istanbul
2025-05-28
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,440
Adapazarı, Adana, Ankara, Istanbul, Konya
2025-05-13
Recruiting
Merck Sharp & Dohme LLC
Phase 2
96
Adana, Ankara, Istanbul, Izmir
2025-05-13
Recruiting
Merck Sharp & Dohme LLC
Phase 1/2
270
Çankaya, Ankara, Istanbul
2025-03-25
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,000
Bornova, Adana, Ankara, Istanbul, Sakarya, Samsun
2025-03-16
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,046
Korfez Mahallesi, Suleymanpasa, Adana, Ankara, Antalya, Istanbul
2025-01-27
Active, closed
Merck Sharp & Dohme LLC
Phase 3
67
Bornova, Ankara, Istanbul
2024-11-21
Recruiting
Merck Sharp & Dohme LLC
Phase 3
680
Sıhhiye, Adapazarı, Tekirdağ, Adana, Ankara, Istanbul, Kayseri, Trabzon
2024-10-21
Active, closed
Merck Sharp & Dohme LLC
Phase 3
300
Bornova, Ankara, Antalya, Edirne, Istanbul, Kocaeli, Samsun
2024-07-16
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,530
Adana, Ankara, Istanbul, Samsun
2024-06-24
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,200
Bornova, Ankara, Antalya, Eskişehir, Istanbul, Kocaeli
2024-06-05
Recruiting
Merck Sharp & Dohme LLC
Phase 3
348
Balçova, Bornova, Adana, Ankara, Istanbul, Sakarya
2024-05-24
Recruiting
Merck Sharp & Dohme LLC
Phase 1/2
220
Adana, Ankara, Istanbul
2024-05-20
Active, closed
Merck Sharp & Dohme LLC
Phase 3
450
Adana, Ankara, Diyarbakır, Erzurum, Istanbul, Samsun, Van
2024-05-03
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,200
Yenimahalle, Stanbul, Adana, Ankara, Istanbul, Samsun
2024-04-14
Recruiting
Merck Sharp & Dohme LLC
Phase 3
780
Korfez Mahallesi, Adana, Ankara, Istanbul, Kayseri
2024-04-03
Active, closed
Merck Sharp & Dohme LLC
Phase 1/2
230
Ankara, Istanbul, Izmir
2024-03-28
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,310
Adana, Ankara, Istanbul, Samsun
2023-12-31
Active, closed
Merck Sharp & Dohme LLC
Phase 3
340
Bornova, Ankara, Antalya, Edirne, Istanbul, Kocaeli, Mersin, Samsun
2023-12-31
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,314
Adana, Ankara, Istanbul, Izmir, Samsun
2023-12-18
Recruiting
Merck Sharp & Dohme LLC
Phase 3
614
Stanbul, Bornova, Talas, Adana, Ankara, Denizli, Istanbul, Samsun
2023-12-15
Recruiting
Merck Sharp & Dohme LLC
Phase 3
1,200
Ankara, Antalya, Edirne, Istanbul, Izmir, Samsun
2023-12-13
Active, closed
Merck Sharp & Dohme LLC
Phase 3
868
Stanbul, Bornova, Ankara, Istanbul
2023-12-06
Active, closed
Merck Sharp & Dohme LLC
Phase 3
556
Stanbul, Bornova, Adana, Ankara, Istanbul
2023-11-12
Active, closed
Merck Sharp & Dohme LLC
Phase 3
1,109
Istanbul- Fatih, Ankara, Antalya, Edirne, Eskişehir, Istanbul, Kocaeli
2023-10-25
Recruiting
Merck Sharp & Dohme LLC
Phase 3
735
Bornova, Tekirdağ, Ankara, Istanbul
2023-08-08
Active, closed
Merck Sharp & Dohme LLC
Phase 3
1,089
Ankara, Istanbul, Izmir
2023-07-19
Recruiting
Merck Sharp & Dohme LLC
Phase 2/3
342
Ankara, Istanbul, Izmir
2023-05-31
Recruiting
Merck Sharp & Dohme LLC
Phase 1/2
230
Adana, Ankara, Erzurum, Istanbul, Izmir
2023-05-16
Active, closed
Merck Sharp & Dohme LLC
Phase 3
300
Stanbul, Suleymanpasa, Ankara, Istanbul, Izmir
2023-03-16
Active, closed
Merck Sharp & Dohme LLC
Phase 2
129
Ankara, Eskişehir, Istanbul
2023-03-16
Active, closed
Merck Sharp & Dohme LLC
Phase 3
377
Ankara, Istanbul, Izmir, Kayseri, Malatya
2023-02-14
Active, closed
Merck Sharp & Dohme LLC
Phase 3
614
Ankara, Edirne, Istanbul, Izmir, Mersin
2023-02-06
Recruiting
Merck Sharp & Dohme LLC
Phase 2
42
Ankara, Istanbul
2023-01-19
Active, closed
Merck Sharp & Dohme LLC
Phase 3
460
Bornova, Adana, Ankara, Istanbul, Izmir
2022-03-24
Active, closed
Merck Sharp & Dohme LLC
Phase 3
1,800
Istanbul- Fatih, Adana, Ankara, Istanbul, Izmir
2022-03-15
Active, closed
Merck Sharp & Dohme LLC
Phase 3
280
Fatih, Ankara, Antalya, Istanbul
2022-02-03
Recruiting
Merck Sharp & Dohme LLC
Phase 2/3
290
Yenimahalle, Bornova, Ankara, Istanbul, Izmir, Samsun
2022-01-14
Active, closed
Merck Sharp & Dohme LLC
Phase 3
643
Sarçam, Fatih, Bornova, Adana, Ankara, Istanbul
2021-12-13
Recruiting
Merck Sharp & Dohme LLC
Phase 2
355
Yüreğir, Bornova, Ankara, Istanbul
2021-08-12
Active, closed
Merck Sharp & Dohme LLC
Phase 2
302
Adana, Ankara, Istanbul
2021-06-25
Active, closed
Merck Sharp & Dohme LLC
Phase 3
342
Bornova, Izmir, Karsiyaka, Adana, Ankara, Antalya, Istanbul, Malatya
2021-06-18
Active, closed
Merck Sharp & Dohme LLC
Phase 3
1,688
Ankara, Edirne, Istanbul, Izmir
2021-04-14
Recruiting
Efficacy and Safety of Nemtabrutinib (MK-1026) in Participants With Hematologic Malignancies (MK-1026-003)
NCT04728893Hematologic Malignancies, Waldenstroms Macroglobulinaemia, Non-Hodgkins Lymphoma, Chronic Lymphocytic Leukaemia
DrugNemtabrutinib
Merck Sharp & Dohme LLC
Phase 2
490
Stanbul, Ankara, Istanbul, Izmir
2021-04-05
Active, closed
Merck Sharp & Dohme LLC
Phase 3
990
Adana, Ankara, Istanbul, Izmir
2021-01-10
Active, closed
Merck Sharp & Dohme LLC
Phase 3
672
Ankara, Istanbul, Izmir
2020-12-08
Active, closed
Merck Sharp & Dohme LLC
Phase 3
870
Ankara, Istanbul, Izmir
2020-07-06
Active, closed
Merck Sharp & Dohme LLC
Phase 3
520
Ankara, Istanbul, Izmir, Trabzon
2020-05-19
Active, closed
Merck Sharp & Dohme LLC
Phase 3
755
Ankara, Edirne, Istanbul, Izmir
2020-02-27
Active, closed
Merck Sharp & Dohme LLC
Phase 3
595
Ankara, Istanbul, Konya, Sakarya, Trabzon
2019-07-24
Active, closed
Merck Sharp & Dohme LLC
Phase 3
1,397
Ankara, Eskişehir, Istanbul, Izmir, Konya
2018-12-24
Active, closed
Merck Sharp & Dohme LLC
Phase 2
329
Konya, Adana, Ankara, Antalya, Edirne, Istanbul, Izmir
2018-12-12
Recruiting
Merck Sharp & Dohme LLC
Phase 3
3,500
Üsküdar /Istanbul, Balçova, Adana, Ankara, Antalya, Edirne, Erzurum, Istanbul
2018-08-21
Rows per page Showing 1–69 of 69
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Cite this view

Priya Life Science (2026). Clinical trial register: studies with a Turkish investigative site, filtered. Derived from ClinicalTrials.gov. Retrieved 11 October 2026. https://priyalifescience.com/clinical-trials-turkey/city/istanbul

Query this register directly
GET /api/trials?country=in&status=recruiting&format=json Try it now →

About this register

This register is built from ClinicalTrials.gov, the trial registry run by the U.S. National Library of Medicine. It includes every study on the registry that lists at least one investigative site in Turkey and is recruiting, not yet recruiting, active but no longer recruiting, or enrolling by invitation: 5,418 studies in total at the last sync on 11 Oct 2026, 03:18 UTC. The full list can be downloaded as CSV or queried as JSON through the register API.

This page shows the 69 of those studies with a site in Istanbul that also match the filters currently applied.

How many clinical trials are recruiting in Istanbul?

40 of the 69 studies on this page are recruiting new participants as of the 11 Oct 2026, 03:18 UTC sync. A further 0 have not yet opened recruitment, 29 are active but closed to new participants, and 0 are enrolling by invitation only. Eligibility for any study is decided by its study team.

Summary by phase

Studies by phase (Istanbul), 69 studies
PhaseStudiesRecruitingShare
Phase 3472268.1%
Phase 212917.4%
Phase 1/27610.1%
Phase 2/3334.3%

Most active sponsors

Lead sponsors with the most studies (Istanbul)
Lead sponsorStudiesRecruiting
Merck Sharp & Dohme LLC6940
Listing here is informational and not medical advice; eligibility is determined by each study team. See also the Ireland, UK, EU, USA and China registers.