Melanin binding: uveal tract radioactivity ~6-fold higher in pigmented rats, retained beyond 504 h
“In pigmented rats, concentrations of radioactivity in the uveal tract were approximately 6-fold higher than those observed for albino rats, and were measurable through the last timepoint, indicating retention of DRM beyond 504 hours postdose.”
Low or no exposure margins: NOAEL/LOAEL exposures below human exposure at the recommended dose
“The exposures at the no observed adverse effect levels/lowest observed adverse effect levels in the 52-week monkey study, 26-week rat study, and 13-week mouse study were less than the human exposures at the recommended human dose (RHD).”