Pharmaceutical Starter Pellets Using Isomalt and MCC
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Solution Overview
Problem
Current pharmaceutical starter pellets face challenges in releasing active ingredients independently of osmolality and have poor processability, with existing materials like sucrose and microcrystalline cellulose (MCC) exhibiting high friability and solubility issues that affect coating efficiency and release kinetics.
Innovation Solution
A composition comprising a mixture of 1,6-GPS and 1,1-GPM (isomalt) combined with microcrystalline cellulose (MCC) is used to create starter pellets that enhance the solubility and processability, allowing for controlled and independent release of active ingredients from the pellets, regardless of osmolality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sucrose-based starter pellets are used, then active ingredient release is improved due to high water solubility, but processability deteriorates due to high friability and abrasion
Solution Approach 1:
The patent uses a composite material consisting of microcrystalline cellulose (MCC) as the base material combined with water-soluble excipients (such as crospovidone, sodium starch glycolate, or carboxymethyl cellulose) in specific ratios (0.1-10% w/w). This composite structure allows the pellets to maintain the low friability of MCC while incorporating the water-solubility and rapid disintegration properties of the excipients, thereby achieving both good processability and reliable active ingredient release.
2Ease of manufacture
If microcrystalline cellulose (MCC) starter pellets are used, then processability is improved due to low friability and low abrasion, but active ingredient release deteriorates because the pellets are not water-soluble and do not break down enzymatically
Solution Approach 1:
The patent changes the chemical composition parameters of the MCC pellets by incorporating water-soluble excipients at controlled concentrations (0.1-10% w/w). This parameter modification enables the MCC matrix to become water-soluble or rapidly disintegrating while maintaining the structural integrity and low friability characteristics of MCC, thus resolving the contradiction between processability and active ingredient release.
3Productivity
If high spray rates are used in coating process, then productivity is improved with reduced process dwell times, but coating quality deteriorates due to dissolution or clumping of sucrose pellets
Solution Approach 1:
The patent employs water-soluble excipients that act as temporary, sacrificial components during the coating process. These excipients provide initial surface solubility that prevents clumping at high spray rates, and are subsequently removed or dissolved after coating is complete, leaving a stable, non-dissolving MCC-based pellet structure. This allows high-speed coating without compromising coating quality.
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 pellets demonstrate improved release kinetics and processability, with enhanced coating efficiency and reduced influence from osmolality, enabling faster and more complete release of active ingredients, such as Diclofenac-Na, even at high MCC content.
Implementation Method 1
A composition comprising a mixture of 1,6-GPS and 1,1-GPM (isomalt) combined with microcrystalline cellulose (MCC) is used to create starter pellets that enhance the solubility and processability
Implementation Method 2
In pellets coated with a water-insoluble and permeable membrane that are located in the gastrointestinal tract, incoming water builds up an internal osmotic pressure between the inner and outer pellet layers, provided there is an osmotically active substance within the membrane. The release of the active ingredient is supported by the osmotic gradient.
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
The invention relates to improved pharmaceutical starter pellets consisting of a composition containing a mixture of 1.6-GPS and 1.1-GPM, especially isomalt, und microcrystalline cellulose (MCC), and to the use of the composition in pharmaceutical starter pellets for improving the release of a pharmaceutical active substance from the pellets and for improving the working properties.