“In Madin‐Darby canine kidney (MDCK) cells stably expressing rat OCT2 (MDCK‐rOCT2) and kidney slices, saturable and non‐saturable uptake of berberine was observed, and corticosterone could inhibit the uptake of berberine , with IC50 values of 0.1 μm and 147.9 μm, respectively.”
“In animal experiments, compared with the berberine alone group, the cumulative urinary excretion of berberine significantly decreased in the corticosterone or pyrimethamine pretreatment groups.”