When using iontophoresis to enhance the transcutaneous permeation of ionic drugs into the skin, what polarity must the electrode be in relationship to the medication?
A)There is no relationship between the polarity of the medication and the electrode.
B)The polarity of the medication and the electrode should be the same.
C)The polarity of the medication and the electrode should be the opposite of each other.
D)As long as the electrode with the medication is hydrated, the polarity of the electrode makes no difference.

Question

Quizplus · Accepted Answer

The polarity of the medication and the electrode should be the same to ensure that the medication is repelled into the skin. This is based on the principle that like charges repel each other, thus an electrode with the same charge as the medication will push the medication away from itself and into the skin.

When Using Iontophoresis to Enhance the Transcutaneous Permeation of Ionic