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Related Concept Videos

Noncompartmental Analysis: Mean Residence Time01:05

Noncompartmental Analysis: Mean Residence Time

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According to statistical moment theory, mean residence time (MRT) is an important measure in pharmacokinetics. MRT can be defined as the expected mean of a probability density function distribution. It provides valuable insights into drug disposition in the body.
After the administration of a drug through intravenous bolus injection, the drug molecules are distributed throughout the body and remain there for varying periods. The MRT represents the average time these drug molecules stay in the...
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Factors Influencing Drug Absorption: Pharmaceutical Parameters01:28

Factors Influencing Drug Absorption: Pharmaceutical Parameters

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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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Drug Dissolution: Requirements and Profile Comparison01:14

Drug Dissolution: Requirements and Profile Comparison

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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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Noncompartmental Analysis: Mean Transit, Absorption and Dissolution Time01:02

Noncompartmental Analysis: Mean Transit, Absorption and Dissolution Time

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When drugs are administered extravascularly, a comprehensive evaluation through noncompartmental analysis becomes imperative. This analytical approach considers various parameters that play a crucial role in understanding the pharmacokinetics of these drugs.
One of the key parameters is the mean transit time (MTT), which refers to the total duration required for drug molecules to transit through the body. MTT is determined by calculating the ratio of the area under the moment curve to the area...
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Formulation and Manufacturing Process: Physical Attributes of Generic Tablets and Capsules01:18

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Bioequivalence in generic drugs, such as tablets and capsules, refers to their pharmaceutical equivalence to the brand-name counterparts. However, for therapeutic equivalence, manufacturers must also consider physical attributes like size, shape, and weight (FDA Guidance for Industry, December 2003). Discrepancies in these aspects could impact patient compliance and cause medication errors. For instance, swallowing difficulties, often experienced with larger tablets or capsules, can lead to...
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Factors Influencing Drug Absorption: Drug Dissolution01:27

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The pharmacokinetic journey of drugs from solid oral dosage forms into systemic circulation is multifaceted. It begins with disintegration, a prerequisite ensuring a solid dosage form's subdivision into minute particles. Dissolution occurs next as these granulated entities solubilize in gastrointestinal fluids. This solubilization is crucial for the succeeding stage, permeation, which describes the traversal of the drug across the intestinal membrane and its subsequent entry into the blood...
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Using residence time distribution in pharmaceutical solid dose manufacturing - A critical review.

Pooja Bhalode1, Huayu Tian2, Shashwat Gupta1

  • 1Department of Chemical and Biochemical Engineering, Rutgers - The State University of New Jersey, Piscataway, NJ 08854, USA.

International Journal of Pharmaceutics
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Summary

Standardizing residence time distribution (RTD) studies is crucial for robust pharmaceutical continuous manufacturing (CM). This review provides guidelines for RTD implementation, enhancing predictive modeling and ensuring product quality in solid-dose production.

Keywords:
Continuous pharmaceutical manufacturingMaterial traceabilityProcess verification and health monitoringRTD applicationsRealtime quality assuranceResidence time distributionUnit operation and flowsheet characterization

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Area of Science:

  • Pharmaceutical Manufacturing
  • Chemical Engineering
  • Process Analytical Technology (PAT)

Background:

  • Continuous manufacturing (CM) offers advantages in pharmaceutical production quality and efficiency, aligning with FDA's quality-by-design (QbD) principles.
  • Accurate predictive models for unit operations are essential for robust CM, requiring a deep understanding of process characteristics.
  • Residence Time Distribution (RTD) is a key tool for characterizing mixing and developing predictive models in pharmaceutical manufacturing.

Purpose of the Study:

  • To address the lack of standardized guidelines for implementing, executing, and evaluating RTD studies in pharmaceutical manufacturing.
  • To provide a detailed review and critical discussion of RTD studies to prevent errors and ambiguity in their application.
  • To aid in developing standardized guidelines for RTD determination and application in solid-dose manufacturing.

Main Methods:

  • Comprehensive literature review of RTD studies in pharmaceutical manufacturing.
  • Critical discussion of RTD determination, including experimental approaches, data acquisition, pre-treatment, modeling, and metrics.
  • Examination of RTD applications in solid-dose manufacturing and analysis of limitations.

Main Results:

  • Identified ambiguity in current RTD study implementations due to a lack of standardization by regulatory agencies.
  • Detailed the critical steps involved in RTD evaluation, from experimental design to metric calculation.
  • Highlighted the importance and limitations of RTD for solid-dose manufacturing processes.

Conclusions:

  • Standardized guidelines for RTD studies are necessary to ensure accurate implementation and reliable predictive modeling in pharmaceutical CM.
  • The review provides a foundation for developing such guidelines, improving process understanding and control.
  • Further research into RTD limitations and future improvements is recommended for robust solid-dose manufacturing.