Which modality is used for drug delivery via iontophoresis?

Which modality is used for drug delivery via iontophoresis?

• A. Transcutaneous Electrical Nerve Stimulation (TENS)
• B. Interferential current therapy
• C. Iontophoresis
• D. High-volt wound healing and edema control

Answer: (C)

Delivering drugs through the skin relies on moving charged molecules with electrical current. Iontophoresis uses a small direct current to drive ionized medications from the application site into underlying tissues, pushing the ions into the tissue via electromigration. This method provides localized drug delivery with minimal systemic exposure. Other common electrical modalities are focused on stimulation or tissue response rather than drug transport: one stimulates nerves to modulate pain, another uses interference of currents for therapy, and another uses high-voltage pulsed current mainly for wound healing and edema control. Thus, the modality that delivers drugs through the skin by electrical current is the one designed to push ionized medications into tissue.

Delivering drugs through the skin relies on moving charged molecules with electrical current. Iontophoresis uses a small direct current to drive ionized medications from the application site into underlying tissues, pushing the ions into the tissue via electromigration. This method provides localized drug delivery with minimal systemic exposure. Other common electrical modalities are focused on stimulation or tissue response rather than drug transport: one stimulates nerves to modulate pain, another uses interference of currents for therapy, and another uses high-voltage pulsed current mainly for wound healing and edema control. Thus, the modality that delivers drugs through the skin by electrical current is the one designed to push ionized medications into tissue.