This poster from the Department of Pharmacy, University of Copenhagen, demonstrates how Flow Induced Dispersion Analysis (FIDA) was used to characterise a range of drug interactions in solution — small-molecule binding to cyclodextrins, drug binding to human serum albumin across temperatures, and drug partitioning into surfactant micelles. FIDA ranked drug–cyclodextrin affinities (warfarin > terbutaline > epinephrine), measured temperature-dependent fluorescein–albumin binding, and sized polysorbate-80 micelles (4.2–5.0 nm) in agreement with NMR. It is an example of using FIDA to characterise small-molecule binding and formulation interactions in solution.