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Related Concept Videos

Factors Influencing Drug Absorption: Pharmaceutical Parameters01:28

Factors Influencing Drug Absorption: Pharmaceutical Parameters

Solid dosage forms such as tablets and capsules undergo rigorous manufacturing processes to ensure stability and effectiveness. Their dissolution and absorption properties are influenced significantly by the choice of excipients (inactive ingredients that serve various roles in the formulation), and the methodology applied during production. The manufacturing parameters, such as compression force and granulation techniques, significantly affect dissolution rates. Elevated compression forces...
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Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are employed to...
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Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
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Changes in polymorphic forms can significantly influence the bioavailability of poorly soluble drugs. Although the FDA defines pharmaceutical equivalence based on having the same active ingredient, dosage form, and route of administration, it does not automatically disqualify products with different polymorphic forms. This means two products with different polymorphs can still be deemed pharmaceutically equivalent. However, polymorphic differences can affect properties like wettability,...

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Related Experiment Video

Updated: Jun 29, 2026

Solid Lipid Nanoparticles SLNs for Intracellular Targeting Applications
08:19

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Published on: November 17, 2015

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Development of Solid Lipid Nanoparticles as Dry Powder: Characterization and Formulation Considerations.

Debora Santonocito1, Maria Grazia Sarpietro1, Francesco Castelli1

  • 1Department of Drug and Health Science, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy.

Molecules (Basel, Switzerland)
|February 25, 2023
PubMed
Summary
This summary is machine-generated.

Drying solid lipid nanoparticles (SLNs) into powders is crucial for stability. Freeze-drying, especially with 1% glucose, effectively preserves SLN properties for pharmaceutical use.

Keywords:
differential scanning calorimetryfreeze-dryingsolid lipid nanoparticlesspray-drying

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Area of Science:

  • Pharmaceutical Technology
  • Nanotechnology
  • Materials Science

Background:

  • Solid lipid nanoparticles (SLNs) are advanced lipid-based colloidal systems for active compound delivery.
  • SLNs face challenges with physical and chemical instability during storage, necessitating stable dried formulations.
  • Developing a dry SLN powder is essential for improved pharmaceutical applications and shelf-life.

Purpose of the Study:

  • To identify optimal methods for producing dry solid lipid nanoparticle (SLN) powder formulations from suspensions.
  • To evaluate the suitability of freeze-drying and spray-drying techniques for SLN powder production.
  • To assess the impact of cryoprotectants on SLN stability during drying processes.

Main Methods:

  • SLN suspensions were dried using both freeze-drying and spray-drying techniques.
  • Nanotechnological parameters, system morphology, and thermal behavior (differential scanning calorimetry) were analyzed.
  • Cryoprotective effects of glucose and mannitol were investigated during freeze-thaw cycles and freeze-drying.

Main Results:

  • Both freeze-drying and spray-drying successfully produced SLN dry powders, albeit with varying yields.
  • Optimized freeze-drying conditions yielded a dry SLN powder with excellent reconstitution properties and preserved technological parameters.
  • Glucose, particularly at 1% w/v, demonstrated superior cryoprotective efficacy against particle growth during all freeze-drying stages.

Conclusions:

  • Freeze-drying and spray-drying are viable methods for obtaining stable SLN dry powders for pharmaceutical applications.
  • Optimized freeze-drying, utilizing 1% glucose as a cryoprotectant, is highly effective in maintaining SLN integrity and functionality.
  • The development of stable, dried SLN formulations significantly enhances their potential for pharmaceutical drug delivery.