Iontophoresis is the process of infusing water-soluble products into the skin with the use of electric current, such as the positive and negative poles of a galvanic machine.

• A. Infusing water-soluble products into the skin with current
• B. Heating tissue with current
• C. Damaging tissue with current
• D. Removing water from skin with current

Answer: (A)

Iontophoresis is about using an electric current to move water-soluble products into the skin. The galvanic current provides a field between the positive and negative poles, which pushes charged molecules of the product into the deeper skin layers. This delivery method relies on the electrical driving force to enhance penetration, not on heating or destroying tissue. That’s why the precise description is infusing water-soluble products into the skin with current. The alternatives describe effects like heating tissue, causing damage, or removing water, none of which define iontophoresis.