Transdermal flux enhancement due to electroosmosis during
DC iontophoresis is generally less than 20% of that of
electrophoresis for a small permeant (19,23), and the average
value of Pe is approximately one-tenth of the K value. From
Eqs. 3 and 4, E$y $20 and 104 for TEA and 2 and 10 for ARA
at 0.5 and 2.5 V DC iontophoresis, respectively