phase 0 clinical studies

synonym: exploratory investigational new drug
https://doi.org/10.1351/goldbook.12707
Exploratory first-in-human trials that involve microdosing of drug to allow the assessment of pharmacokinetic parameters with limited drug exposure.
Note: These trials have no therapeutic or diagnostic intent but are designed to assist decision making by providing bioavailability, metabolism, and other limited data from a small number of patients.
Source:
PAC, 2013, 85, 1725. (Glossary of terms used in medicinal chemistry. Part II (IUPAC Recommendations 2013)) on page 1746 [Terms] [Paper]