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Long acting injectable formulations: the state of the arts and challenges of poly(lactic-co-glycolic acid) microsphere, hydrogel, organogel and liquid crystal

  • Won Young Lee
  • Md. Asadujjaman
  • Jun-Pil JeeEmail author
Review
  • 27 Downloads

Abstract

Background

Long-acting injectable formulations (LAIFs) have received substantial attention recently due to their advantages over conventional formulations, including easy administration, continuous and controlled release of drug over months, and the ability to maintain drug concentrations within the therapeutic range. The constant advances in biotechnology produce complex active pharmaceuticals that might be difficult to administer by conventional means. In particular, peptides, proteins, and antibodies are hard to administer orally given their physicochemical instability in the gastrointestinal tract and short half lives in blood. Therefore, LAIFs are a good candidate delivery system for such drugs. LAIFs reduce the frequency of application and improve patient compliance. For instance, LAIF-based antipsychotics can be more effective in patients with bipolar disorder and schizoaffective disorder.

Area covered

This review provides an overview of the various drug delivery technologies using LAIFs. Poly (lactic-co-glycolic acid) microspheres, hydrogels, organogels, and liquid crystals were chosen as representative LAIFs, and their preparation methods, advantages, limitations, challenges, and prospects are discussed.

Expert opinion

LAIFs are an attractive delivery system for bio-macromolecules that might participate in the new drug paradigm in the future. While each LAIF-based delivery technology has its own unique advantages, there are still some limitations that need to be overcome, and studies are being performed to understand and address these limitations.

Keywords

Poly (lactic-co-glycolic acid) Microsphere Hydrogel Organogel Liquid crystal Long acting injection 

Notes

Acknowledgements

This work was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2018R1D1A1B07045240).

Compliance with ethical standards

Conflict of interest

The authors report no conflicts of interest in this work.

Statement of human and animal rights

This article does not contain any studies with human or animal subjects performed by any of the authors.

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Copyright information

© The Korean Society of Pharmaceutical Sciences and Technology 2019

Authors and Affiliations

  1. 1.College of PharmacyChosun UniversityGwangjuRepublic of Korea

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