Number of clinical trials in Iran
Iran: Number of clinical trials was 31 trials in 2024. ▲ Rising
Number of clinical trials in Iran, 2003–2024
Source: ClinicalTrials.gov (2025) – with major processing by Our World in Data. Measured in trials.
Analysis
In 2024, number of clinical trials in Iran stood at 31 trials.
The figure is down 18.4% on the previous year and down 20.5% over ten years.
Over the whole period, number of clinical trials in Iran peaked at 63 trials in 2013 and was at its lowest, 2 trials, in 2004.
Iran ranks 46th of 153 countries on this measure, in the middle of the range.
The long-run direction has been consistently rising across the 22 years of available data.
Number of clinical trials in Iran, year by year
| Year | trials | Change |
|---|---|---|
| 2003 | 3 trials | — |
| 2004 | 2 trials | -33.3% |
| 2005 | 3 trials | +50.0% |
| 2006 | 17 trials | +466.7% |
| 2007 | 23 trials | +35.3% |
| 2008 | 40 trials | +73.9% |
| 2009 | 55 trials | +37.5% |
| 2010 | 59 trials | +7.3% |
| 2011 | 51 trials | -13.6% |
| 2012 | 60 trials | +17.6% |
| 2013 | 63 trials | +5.0% |
| 2014 | 39 trials | -38.1% |
| 2015 | 36 trials | -7.7% |
| 2016 | 39 trials | +8.3% |
| 2017 | 49 trials | +25.6% |
| 2018 | 40 trials | -18.4% |
| 2019 | 39 trials | -2.5% |
| 2020 | 39 trials | +0.0% |
| 2021 | 34 trials | -12.8% |
| 2022 | 42 trials | +23.5% |
| 2023 | 38 trials | -9.5% |
| 2024 | 31 trials | -18.4% |
Iran compared with similar countries
- Iran's 31 trials is above the median for upper middle income countries, which is 5 trials, 6.2× the median. (41 countries reporting)
- Iran's 31 trials is above the median for Middle East, North Africa, Afghanistan & Pakistan, which is 17 trials, 1.8× the median. (20 countries reporting)
Biggest year-on-year movements
Years where Number of clinical trials in Iran changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2006 | +466.7% | 3 trials | 17 trials |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 20.43 trials | 2 trials | 55 trials | 7 |
| 2010s | 47.5 trials | 36 trials | 63 trials | 10 |
| 2020s | 36.8 trials | 31 trials | 42 trials | 5 |
Countries ranked near Iran
More reference data data for Iran
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 26.62 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 12.01 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 3.47 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 1.34 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 26.62 (2050)
- Emission Totals - Direct emissions (N2O) - Manure applied to Soils 8.15 (2050)
- Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation 35,629 (2050)
- Emission Totals - Emissions (CO2eq) (AR5) - Crop Residues 1,936 (2050)
- Emission Totals - Direct emissions (N2O) - Manure left on Pasture 34.53 (2050)
- Emission Totals - Emissions (CO2eq) (AR5) - Burning - Crop residues 281.19 (2050)
Frequently asked questions
- What is number of clinical trials in Iran?
- Number of clinical trials in Iran was 31 trials in 2024, according to ClinicalTrials.gov (2025) – with major processing by Our World in Data.
- What is the highest number of clinical trials recorded in Iran?
- The highest recorded value was 63 trials in 2013.
- What is the lowest number of clinical trials recorded in Iran?
- The lowest recorded value was 2 trials in 2004.
- How does Iran rank for number of clinical trials?
- Iran ranks 46th out of 153 countries with data for 2024.
- Is number of clinical trials rising or falling in Iran?
- Over the last ten years it is down 20.5%. The long-run trend across the full record is rising.
- Where does this Iran data come from?
- The figures come from ClinicalTrials.gov (2025) – with major processing by Our World in Data, published as part of Number of clinical trials. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 22 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Annual number of completed clinical trials registered in the ClinicalTrials.gov database for each country. Registration in the ClinicalTrials database is mandatory for trials in the United States, but voluntary for other countries.