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Related Experiment Videos

Solid lipid microparticles containing loratadine prepared using a Micromixer.

Spomenka Milak1, Natalie Medlicott, Ian G Tucker

  • 1PLIVA-Research & Development Ltd., Zagreb, Croatia. spomenka.milak@pliva.hr

Journal of Microencapsulation
|March 30, 2007
PubMed
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Solid lipid microparticles showed limited taste-masking ability for loratadine in liquid suspensions. While effective in solid dosage forms, these microparticles did not reduce drug concentration in the aqueous phase of suspensions.

Area of Science:

  • Pharmaceutical Sciences
  • Drug Delivery Systems
  • Materials Science

Background:

  • Taste-masking is crucial for improving patient compliance, especially for bitter or unpleasant-tasting drugs.
  • Lipophilic drugs present challenges for taste-masking in aqueous formulations like suspensions.
  • Solid lipid microparticles offer a potential strategy to reduce drug concentration in the aqueous phase.

Purpose of the Study:

  • To evaluate solid lipid microparticles (Precirol ATO 5) as a taste-masking system for a lipophilic weak base (loratadine).
  • To investigate the influence of drug loading, PVA concentration, and water/lipid ratio on microparticle characteristics and performance.
  • To assess the in-vitro release and partitioning behavior of loratadine from lipid microparticles in simulated physiological fluids.

Main Methods:

Related Experiment Videos

  • Preparation of loratadine-loaded Precirol ATO 5 microparticles using a Micromixer.
  • Characterization of microparticles: size, encapsulation efficiency, surface morphology.
  • In-vitro release studies in simulated saliva and simulated gastric fluid; drug partitioning analysis in suspension.

Main Results:

  • Loratadine release was slow in simulated saliva but rapid at gastric pH.
  • Drug partitioning into the aqueous phase of the suspension was comparable to a simple drug suspension.
  • Microparticle characteristics were influenced by drug loading, PVA concentration, and water/lipid ratio.

Conclusions:

  • Solid lipid microparticles demonstrated limited efficacy for taste-masking loratadine in liquid suspensions due to insufficient reduction in aqueous drug concentration.
  • These microparticles may hold potential for taste-masking applications in solid dosage forms.
  • Further research could explore modifications to enhance taste-masking in liquid formulations.