phase IV clinical studies

https://doi.org/10.1351/goldbook.12711
Extended post-marketing studies in humans.
Note: These trials are designed to broaden information concerning treatment risks, benefits, and optimal drug use.
Source:
PAC, 2013, 85, 1725. (Glossary of terms used in medicinal chemistry. Part II (IUPAC Recommendations 2013)) on page 1746 [Terms] [Paper]