Co-processed MCC and Mannitol Excipient for Direct Compression
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Solution Overview
Problem
Microcrystalline cellulose (MCC) exhibits lubricant sensitivity, reducing tablet strength and hardness when lubricants are added, limiting its compactability and ejection force profile in direct compression tablet formulations.
Innovation Solution
A co-processed composition of MCC with a sugar alcohol, such as mannitol, is created through an aqueous slurry process followed by spray drying, achieving a ratio of 99:1 to 1:99, which enhances compactability, reduces lubricant sensitivity, and lowers ejection force, making it suitable for direct compression tablet formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If microcrystalline cellulose is used as an excipient in direct compression tablet formulations, then good binding and disintegration properties are obtained, but lubricant sensitivity reduces tablet strength and hardness
Solution Approach 1:
The patent combines microcrystalline cellulose with sugar alcohols (mannitol, sorbitol, xylitol, or lactitol) in specific ratios (70:30 to 95:5) to create a composite excipient material. This composite reduces lubricant sensitivity while maintaining or improving tablet strength and hardness, directly resolving the contradiction between obtaining good binding properties and avoiding lubricant-induced strength reduction.
Solution Approach 2:
The patent changes the physical and chemical parameters of the excipient system by co-processing MCC with sugar alcohols through aqueous slurry formation and spray drying. This creates a new material with modified properties including reduced lubricant sensitivity and improved compactability, thereby resolving the strength-lubricant sensitivity contradiction.
2Ease of manufacture
If direct compression is used for tablet preparation, then fewer unit operations and lower production cost are achieved, but the formulation must possess specific physical characteristics including sufficient binding and free-flowing properties
Solution Approach 1:
The co-processed MCC/sugar alcohol composite provides a versatile excipient that simultaneously delivers free-flowing properties, sufficient binding, and lubricant sensitivity reduction. This enables direct compression formulations to meet multiple physical characteristic requirements while maintaining production cost advantages.
Solution Approach 2:
The composite excipient performs multiple functions: it provides free-flowing characteristics for good powder flow, sufficient binding for tablet integrity, and reduced lubricant sensitivity for maintained tablet strength. This multi-functionality allows direct compression to succeed without requiring separate additives for each property.
3Ease of operation
If lubricant is added to the tablet formulation, then free-flowing properties and ease of ejection are improved, but bonding between particles is reduced leading to lower tablet strength
Solution Approach 1:
The MCC/sugar alcohol composite creates a material system where the sugar alcohol component mitigates the harmful effects of lubricants on particle bonding. This allows lubricants to be used for ease of ejection while the composite structure maintains tablet strength through reduced lubricant sensitivity.
Solution Approach 2:
The patent converts the harmful effect of lubricants (reducing particle bonding) into a beneficial situation by using the sugar alcohol component to protect against lubricant-induced strength loss. The composite allows lubricant use for ease of operation while converting the potential harm into minimal impact on tablet strength.
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 co-processed MCC/sugar alcohol composition demonstrates superior compactability, reduced lubricant sensitivity, and lower ejection force, resulting in more robust and efficient tablet production with improved handling and packaging characteristics.
Implementation Method 1
mixing some or all of the ingredients of the dosage form and thereafter adding solutions of a binding agent to the mixed powders
Implementation Method 2
drying, e.g., via tray drying, the use of a fluid-bed dryer, spray-dryer, radio-frequency dryer, microwave, vacuum, or infra-red dryer
Data Source
AI summary
A particulate co-processed composition comprising microcrystalline cellulose and at least one sugar alcohol is disclosed. A preferred sugar alcohol is mannitol. The composition has an improved compactability profile, lubricant sensitivity, and ejection profile compared to microcrystalline cellulose and the at least one sugar alcohol, either alone or in combination as a simple dry blend, in the preparation of solid dosage formulations, such as tablets. Tablets comprising the particulate co-processed composition, an active, and, optionally, one or more other excipients, and method for their preparation, are also disclosed.