High-Content 6-Fluoro-3-Hydroxy-2-Pyrazinecarboxamide Tablets
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Solution Overview
Problem
Current methods fail to produce tablets with a high content of 6-fluoro-3-hydroxy-2-pyrazinecarboxamide that are easily ingestible, have excellent dissolution properties, and are durable against film coating, packaging, and transportation, while maintaining necessary hardness.
Innovation Solution
A tablet formulation containing 6-fluoro-3-hydroxy-2-pyrazinecarboxamide, low substituted hydroxypropyl cellulose or croscarmellose sodium, and a binder, with the compound comprising 50 to 95% of the tablet mass, utilizing a combination of binders and granulation methods like fluidized bed granulation to enhance compressive molding and dissolution properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the amount of compound A or salt thereof in the tablet is increased to reduce the number of tablets and improve drug compliance, then the tablet size becomes too large to be easily ingestible
Solution Approach 1:
The patent changes the physical and chemical parameters of the compound A or its salt, specifically improving its compressive molding property to enable high-concentration tablets (50-95% compound content) to be compressed into small sizes (diameter 7-9mm) that are easily ingestible while maintaining high drug compliance
Solution Approach 2:
The patent utilizes granulated powder with controlled porosity and specific volume characteristics to achieve high compound concentration while maintaining small tablet size and good compressibility, allowing the tablet to be both compact and ingestible
2Strength
If an additive with high molding property such as crystalline cellulose is compounded to achieve necessary tablet hardness, then the tablet size becomes too large
Solution Approach 1:
The patent fundamentally changes the compressive molding property parameter of compound A or its salt through chemical modification or salt formation, enabling the compound itself to provide sufficient hardness without requiring large amounts of inert additives like crystalline cellulose, thus maintaining small tablet size
Solution Approach 2:
The patent creates a composite granulated powder system combining compound A or its salt with binders and low substituted hydroxypropyl cellulose in specific ratios (50-95% compound, 2-20% binder, 0.1-10% low substituted hydroxypropyl cellulose) to achieve both hardness and small size
3Ease of operation
If a fluidity promoter is compounded to enhance fluidity and charging property, then the cohesive force of the mixed powder is not sufficiently improved
Solution Approach 1:
The patent creates a multi-component composite granulated powder system where compound A or its salt is combined with specific binders (1-20%), low substituted hydroxypropyl cellulose (0.1-10%), and fluidity promoters (0.1-5%) in optimized ratios, achieving both excellent fluidity for charging and sufficient cohesive force for tablet formation
Solution Approach 2:
The patent applies different functional materials to different aspects of the granulated powder: binders for cohesive force, low substituted hydroxypropyl cellulose for disintegration and fluidity, and fluidity promoters for charging property, with each component optimized for its specific function rather than using a single additive for all purposes
Data Source
AI summary
Disclosed is a useful tablet which contains a high quantity of 6-fluoro-3-hydroxy-2-pyrazinecarboxamide or a salt thereof; has a size that is easy to ingest; has superior release characteristics; and has a hardness that can withstand film coating, packaging, and transportation.