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Related Concept Videos

Drug Delivery: Miscellaneous Routes01:22

Drug Delivery: Miscellaneous Routes

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Drug delivery methods like oral inhalation, nasal sprays, transdermal patches, eye drops, intravitreal injection,  and rectal administration provide localized effects with reduced toxicity.
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The selection of a drug's delivery route depends upon its physicochemical properties, including lipid or water solubility and ionization, as well as the therapeutic requirement, such as immediate or sustained effect. These routes can be divided into three primary categories: enteral, parenteral, and topical.
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Related Experiment Video

Updated: Nov 5, 2025

Development, Characterization, and Evaluation of CAGE-based Ionic Liquid Systems for Transdermal Delivery
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Ionic Liquid-Enabled Topical Delivery of Immunomodulators.

Zongmin Zhao1,2, Eden E L Tanner1, Jayoung Kim1

  • 1John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.

ACS Biomaterials Science & Engineering
|May 13, 2021
PubMed
Summary
This summary is machine-generated.

Ionic liquids improve the solubility and topical delivery of immunomodulators like imiquimod and triamcinolone acetonide. This novel ionic liquid-based strategy enhances drug penetration into deep skin layers, offering a promising new delivery platform.

Keywords:
drug deliveryimiquimodimmunomodulationionic liquidskintriamcinolone

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Area of Science:

  • Dermatology
  • Materials Science
  • Pharmacology

Background:

  • The skin's immune activity and barrier properties present challenges for topical drug delivery.
  • Immunomodulators are crucial for treating various skin conditions but face delivery hurdles.

Purpose of the Study:

  • To develop and evaluate an ionic liquid (IL)-based formulation for enhanced skin delivery of immunomodulators.
  • To assess the efficacy of ILs in improving immunomodulator solubility and skin penetration.

Main Methods:

  • Formulation of imiquimod (IMQ) and triamcinolone acetonide (TCA) using ionic liquids.
  • Ex vivo skin penetration studies comparing IL formulations with commercial products.
  • Assessment of drug solubility and stability in IL formulations.

Main Results:

  • Ionic liquids significantly enhanced the solubility of IMQ and TCA.
  • IL formulations demonstrated superior skin penetration compared to commercial comparators.
  • Lead IMQ formulation showed >10-fold improvement in deep skin layer delivery versus commercial cream.
  • TCA formulations achieved therapeutic levels in deep skin comparable to intralesional injections.

Conclusions:

  • Ionic liquid-based formulations offer a simple and effective platform for topical immunomodulator delivery.
  • This strategy overcomes skin barrier limitations, improving drug efficacy for dermatological applications.