Two-Stage Wet Granulation for Orally Disintegrating Tablet Hardness
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Solution Overview
Problem
Existing orally disintegrating tablets face challenges in achieving a balance between tablet hardness and disintegrability, with high compression forces leading to prolonged disintegration times and reduced hardness, and low forces resulting in inadequate hardness.
Innovation Solution
A two-stage granulation process using a first disintegrator component with high sedimentation volume, a second disintegrator component other than acid-type carboxylmethylcellulose, and an excipient, where the first wet granulation step involves two of these components and the second step includes the remaining component, optimizing tablet hardness and disintegrability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If molding pressure is increased to increase tablet hardness, then tablet hardness is improved, but disintegration time is prolonged
Solution Approach 1:
The granulation process is divided into two distinct stages: first granulation to form initial granules with basic structure, and second granulation to add disintegrator components. This segmentation allows optimization of each stage's function - the first stage builds structural integrity while the second stage incorporates disintegration promoters, resolving the contradiction between hardness and disintegrability
Solution Approach 2:
The invention changes the parameters of disintegrator components by specifying sedimentation volume (V50 ≥ 4.0 cm³/g) and using multiple disintegrator types with different properties. This parameter optimization ensures that disintegrators remain effective even under higher compression forces, maintaining short disintegration times while achieving desired tablet hardness
2Duration of action of moving object
If molding pressure is reduced to shorten disintegration time, then disintegration time is improved, but tablet hardness becomes smaller
Solution Approach 1:
Disintegrator components are incorporated into the granule structure during the granulation process itself, before tableting. This preliminary incorporation ensures that disintegrators are evenly distributed and positioned to act immediately upon contact with oral fluids, achieving rapid disintegration without requiring reduced compression forces
Solution Approach 2:
The invention uses composite granules containing multiple components including excipients, disintegrators with specific sedimentation volumes, and optionally coating particles. This composite structure combines materials with complementary properties - some providing structural strength and others providing disintegration function - allowing both adequate hardness and rapid disintegration to coexist
3Strength
If high tablet compression force is used, then tablet hardness is improved, but productivity is reduced and coating particle properties deteriorate
Solution Approach 1:
The invention optimizes granule parameters including particle size distribution, moisture content, and disintegrator composition to achieve optimal moldability. These parameter changes allow tablets to reach target hardness at lower compression forces, improving productivity and preserving coating particle integrity
Solution Approach 2:
The granulation process creates granules with locally optimized properties - the core contains disintegrator-rich zones for rapid disintegration, while the structure provides adequate binding. This local quality differentiation allows lower overall compression forces while maintaining both hardness and disintegrability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method produces tablets with enhanced hardness and disintegrability, outperforming compositions made in a single granulation step, with improved production efficiency and reduced machine limitations.
Implementation Method 1
a first disintegrator component having sedimentation volume in water of 4.0 cm3/g or more
Implementation Method 2
first wet granulation step using any two of the three components and a second wet granulation step
Implementation Method 3
wet granulation process
Data Source
Figure 1
AI summary
An object of the present invention is to provide a disintegrative particulate composition that can be used for an orally disintegrating tablet having both excellent tablet hardness and disintegrability. This invention relates to a method for the production of a disintegrative particulate composition including three components consisting of a first disintegrator component having sedimentation volume in water of 4.0 cm3/g or more, a second disintegrator component other than the first disintegrator component and an excipient, which comprises a first wet granulation step using any two of the three components and a second wet granulation step using the granules obtained in the first wet granulation step and at least the remaining one component not used in the first wet granulation step; the disintegrative particulate composition thus produced; and an orally disintegrating tablet comprising a medicinal ingredient and the disintegrative particulate composition.