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In Vitro Drug Dissolution: Alternative Methods01:17

In Vitro Drug Dissolution: Alternative Methods

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Alternative drug dissolution methods include the rotating bottle, intrinsic dissolution test, peristalsis, and the Franz diffusion cell method. The rotating bottle method involves meticulously rotating tightly capped controlled-release beads in a temperature-controlled bath. Periodic decanting of samples allows for residue assay, followed by refilling with fresh medium and testing at various pH levels to emulate the gastrointestinal tract conditions.In contrast, the intrinsic dissolution test...
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In Vitro Drug Dissolution: Compendial Testing Models I01:13

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Compendial dissolution methods are standardized procedures defined by pharmacopeias to evaluate the rate at which a drug dissolves in a specific medium. These methods ensure batch-to-batch consistency, enable quality control, and support the prediction of drug bioavailability. They are critical for both immediate and modified-release drug products.The apparatuses used for dissolution testing differ in their design and mechanical function, but all aim to simulate the physiological environment of...
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Drug Dissolution: Requirements and Profile Comparison01:14

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The acceptance criteria for dissolution profile data are anchored in Q values, representing the percentage of drug dissolved within a specified period. This assessment unfolds in three stages:First Stage: The test passes if all six drug dosage units are equal to or greater than Q plus 5%; otherwise, the sample proceeds to the second stage.Second Stage: The average of twelve units must be equal to or greater than Q, with no unit falling below Q - 15% to pass; if not, it progresses to the final...
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In Vitro Drug Dissolution: Compendial Testing Models II01:09

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Various dissolution methods are utilized to assess a drug’s dissolution rate, including the flow-through cell, paddle-over-disk, cylinder, and reciprocating disk methods.The flow-through cell apparatus (USP (United States Pharmacopeia) method 4) comprises a reservoir for the dissolution medium and a pump that propels the medium through the cell containing the test sample. This method is crucial for assessing modified-release dosage forms with minimally soluble active ingredients,...
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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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Theories of Dissolution: Diffusion Layer Model01:15

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Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
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Dissolution methodology for taste masked oral dosage forms.

Sally Gittings1, Neil Turnbull2, Clive J Roberts1

  • 1School of Pharmacy, The University of Nottingham, Nottingham, UK.

Journal of Controlled Release : Official Journal of the Controlled Release Society
|November 5, 2013
PubMed
Summary

Taste masking in pharmaceuticals is crucial for pediatric and geriatric patients. This review explores oral cavity physiology, taste masking methods, and in vitro dissolution testing for drug formulations.

Keywords:
BiopharmaceuticsBiorelevant dissolutionOral absorptionPaediatricPharmacokineticsTaste masking

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Area of Science:

  • Pharmaceutical Sciences
  • Drug Delivery Systems
  • Oral Formulation Technology

Background:

  • Conventional dosage forms present challenges for pediatric and geriatric populations, necessitating tailored formulations.
  • Taste masking is essential to address swallowing difficulties, patient aversion, and unique dosing requirements.
  • Active Pharmaceutical Ingredients (APIs) can cause undesirable oral sensations beyond bitterness, such as burning or metallic tastes.

Purpose of the Study:

  • To review the anatomy and physiology of the oral cavity relevant to taste masking.
  • To investigate current taste masking techniques for pharmaceutical formulations.
  • To critically evaluate in vitro dissolution methodologies for assessing taste-masked drug products.

Main Methods:

  • Literature review of oral cavity anatomy, physiology, and taste masking strategies.
  • Analysis of in vitro dissolution testing methods for evaluating taste masking efficacy.
  • Discussion of biorelevant dissolution models like TNO Intestinal Model (TIM) and Artificial Stomach and Duodenum (ASD).

Main Results:

  • Various taste masking approaches exist, focusing on reducing API-oral contact or employing competitive inhibition.
  • In vitro dissolution testing quantifies drug release under simulated oral conditions to assess taste masking.
  • Current dissolution methodologies show variability and a lack of biorelevance, hindering accurate prediction of in vivo performance.

Conclusions:

  • Effective taste masking is vital for improving patient compliance, especially in vulnerable populations.
  • Standardized and biorelevant in vitro dissolution methods are needed for reliable evaluation of taste-masked formulations.
  • Advanced models like TIM and ASD offer promising future directions for assessing drug release and pharmacokinetic profiles.