California PTA Laws Practice Exam

Which method of administering medications involves using electrical current?

1. Direct application

2. Iontophoresis

3. Phonophoresis

4. Topical application

The correct answer is: Iontophoresis

Iontophoresis is the method of administering medications that involves the use of electrical current. This technique utilizes a low-level electrical current to deliver charged particles of medication through the skin. Iontophoresis is commonly used for localized treatment of conditions such as inflammation or pain, as it enhances the absorption of therapeutic agents without the need for needles. In this method, a small device is used, which applies an electrical current that pushes the medication into the tissue. This allows for a more targeted delivery of drugs and can often improve the effectiveness of the treatment. The use of electrical current to facilitate drug entry is a key factor that distinguishes iontophoresis from other methods of medication administration. Other methods listed, such as direct application, phonophoresis, and topical application, do not utilize electrical current. Direct application involves placing a medication directly on the skin without any electrical assistance. Phonophoresis uses ultrasound waves to enhance the absorption of topical medications, while topical application generally refers to applying creams, ointments, or gels directly to the skin surface without any additional mechanisms to facilitate deeper penetration.