There are few case reports on potential interactions with organic anion transporters and interference with certain laboratory tests. The fluorescence may interfere with the analysis of blood and urinary parameters for a period of 3 to 4 days. Caution is advised when performing therapeutic drug monitoring for drugs with a narrow therapeutic window, e.g. digoxin, quinidine. Compounds that inhibit or compete with the active transport of organic anions (e.g., probenicid) may affect the systemic profile of fluorescein.
The concomitant use of Fluorescite Injection 10% with beta-blocking agents (including eye-drops solutions) may rarely provoke severe anaphylactic reactions. Beta-blocking agents could reduce the vascular compensation reactions to anaphylactic shock and also reduce the effectiveness of adrenaline in the presence of cardiovascular collapse.
Concomitant intravenous injection of other solutions or the mixing of Fluorescite Injection 10% with other solutions should be avoided as the possibility of interactions cannot be excluded.