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Updated: May 25, 2026
09:44
Development, Characterization, and Evaluation of CAGE-based Ionic Liquid Systems for Transdermal Delivery
Published on: September 26, 2025
Biphasic transdermal iontophoretic drug delivery platform.
Glen W McLaughlin1, Huma Arastu, Joel Harris
1Incube Labs LLC, San Jose, CA, USA.
Summary
Biphasic iontophoresis offers on-demand drug delivery, overcoming limitations of current methods. This new system effectively delivers medication when needed while minimizing passive diffusion during inactive periods.
Area of Science:
- Biomedical Engineering
- Drug Delivery Systems
- Dermatology
Background:
- Transdermal iontophoresis enables active drug delivery for conditions requiring metered doses.
- Current monophasic systems struggle to prevent passive drug diffusion during non-therapy periods.
Purpose of the Study:
- To develop and assess a novel biphasic iontophoretic system for on-demand transdermal drug delivery.
- To overcome the limitations of monophasic iontophoresis in controlling passive diffusion.
Main Methods:
- A biphasic iontophoretic system was developed and tested using FeCl(2) in an in vitro porcine skin model.
- Transport properties were modeled using a Fourier Transform-derived optimum estimate transfer function.
- Experimental data on cumulative and density dose were compared against model predictions.
Main Results:
- The biphasic system demonstrated good correlation between experimental and predicted cumulative dose (R(2)=0.912) and density dose (R(2)=0.802).
- The system effectively delivered the compound during active periods.
- Unwanted off-demand delivery was significantly minimized during inactive periods.
Conclusions:
- Biphasic iontophoresis presents a viable strategy for on-demand transdermal drug therapy.
- This approach effectively controls drug delivery, minimizing passive diffusion when therapy is not required.
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