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Oral Drug Delivery Systems: Introduction01:23

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Oral drug delivery is the most common route of administration due to its convenience, cost-effectiveness, and high patient compliance. It enables precise formulation to ensure proper drug dosage and bioavailability. The development of oral dosage forms considers drug properties such as solubility, stability, and absorption to optimize therapeutic efficacy.Tablets, capsules, liquids, and chewable formulations enhance drug stability, mask undesirable tastes, and improve patient experience.
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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
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Delayed-release drug delivery systems are specialized pharmaceutical formulations designed to postpone the release of active compounds until the drug reaches a specific region of the gastrointestinal (GI) tract, typically the intestine. These systems are essential for drugs that may cause gastric irritation, are unstable in acidic environments, or need to exert therapeutic effects locally in the intestinal or colonic regions.The core feature of delayed-release systems is the use of enteric...
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Continuous-release drug delivery systems offer a strategic approach to maintaining therapeutic drug levels over extended periods following oral administration. By modulating the release rate of active pharmaceutical ingredients, these systems minimize fluctuations in plasma concentrations, which enhances clinical efficacy and reduces the need for frequent dosing. Such characteristics make them particularly advantageous in managing chronic diseases where patient adherence and stable drug...
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Current state and challenges in developing oral vaccines.

Julia E Vela Ramirez1, Lindsey A Sharpe1, Nicholas A Peppas2

  • 1Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA.

Advanced Drug Delivery Reviews
|April 26, 2017
PubMed
Summary

Novel oral vaccines offer a safer, more effective alternative to traditional injections for disease prevention. This research explores the design of next-generation oral vaccines to overcome delivery challenges and enhance immune responses.

Keywords:
AdjuvantsMucosal immunizationOral deliveryOral vaccinesProtein delivery

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Area of Science:

  • Vaccinology
  • Immunology
  • Drug Delivery Systems

Background:

  • Communicable diseases remain a significant global health threat, necessitating advanced prevention strategies beyond traditional vaccination.
  • Current vaccine delivery methods, primarily injections, face challenges in safety, compliance, manufacturing, and administration.
  • Emerging and unaddressed diseases require innovative vaccine solutions.

Purpose of the Study:

  • To explore the rationale and design considerations for next-generation oral vaccine delivery systems.
  • To highlight the advantages of oral vaccine administration for enhanced safety, compliance, and immune response.
  • To address the challenges associated with delivering vaccines via the oral route, including the gastrointestinal environment and immune tolerance.

Main Methods:

  • Review of biological and physicochemical factors influencing oral vaccine efficacy.
  • Analysis of strategies to overcome gastrointestinal barriers for vaccine formulation.
  • Discussion of methods to stimulate both systemic and mucosal immunity via oral administration.

Main Results:

  • Oral vaccine delivery offers potential for broader, long-lasting protection by stimulating both humoral and cellular immunity at systemic and mucosal sites.
  • Successful oral vaccine design requires overcoming the harsh gastrointestinal environment and preventing immune tolerance.
  • Next-generation oral vaccines necessitate careful consideration of biological and physicochemical properties for effective antigen delivery and immune stimulation.

Conclusions:

  • Oral vaccines present a promising, safer, and more accessible alternative to injectable vaccines.
  • Addressing gastrointestinal challenges and immune tolerance is critical for developing effective oral vaccine formulations.
  • Further research into the biological and physicochemical aspects of oral vaccine design is essential for future public health preparedness.