“ Arginine and phenazopyridine enhanced the apparent permeability of alendronate by 14- and 26-fold in the PAMPA model and 6.5- and 4.4-fold across caco-2 cell monolayers, respectively.”
“Cationic counter ions, such as arginine , phenazopyridine, hyoscine and pyridostigmine, were selected to enhance the lipophilicity and permeability of alendronate.”
“Two counter ions, phenazopyridine and arginine , substantially increased the partition coefficient of alendronate by up to 1.15 and 0.73 units, respectively, in the octanol/water system.”