Magnesium Oxide Tablet Composition for 3Fr Feeding Tube Passability
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Solution Overview
Problem
Existing laxative tablets containing magnesium oxide struggle to disintegrate quickly in water and pass through thin feeding tubes used for pediatric patients, leading to potential blockages and increased patient burden.
Innovation Solution
A laxative tablet formulation using specific types of disintegrants and a manufacturing method that yields fine particles with a disintegration time of 10 seconds or less, allowing smooth passage through 3Fr feeding tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional laxative tablet formulations are used, then the tablet structure is maintained, but the disintegration time is too long and particles are too large to pass through thin feeding tubes
Solution Approach 1:
The tablet is segmented into fine particles through optimized disintegrant composition (croscarmellose sodium and carboxymethyl cellulose sodium in specific ratios) and granulation processes, enabling rapid breakdown into particles small enough to pass through 3Fr feeding tubes while maintaining structural integrity during administration
Solution Approach 2:
The invention changes the physical parameters of the tablet by controlling particle size distribution (D10, D50, D90 values) and disintegration time (10 seconds or less) through specific formulation parameters including binder content (1-10%), disintegrant content (1-3.5%), and granulation conditions, transforming the tablet from a cohesive structure to a rapidly disintegrating particle system
2Loss of time
If the tablet disintegrates quickly in water, then fine particles are produced for tube administration, but the binding strength is reduced
Solution Approach 1:
The invention applies local quality by using different excipients with specific functions in different proportions: crystalline cellulose or starch as binder (1-10%) provides structural strength, while croscarmellose sodium and carboxymethyl cellulose sodium as disintegrants (1-3.5%) provide rapid disintegration. The granulation process creates local zones with optimized properties for both strength and disintegration
Solution Approach 2:
The tablet is formulated as a composite material system combining multiple excipients (binder, disintegrants, lubricants) in specific ratios. The composite structure of granules containing magnesium oxide core with excipient matrix provides both mechanical strength for handling and rapid disintegration capability, achieving a balance between binding strength and disintegration speed
Data Source
AI summary
Provided is a laxative tablet which includes magnesium oxide as a main constituent, wherein (1) the particle size by volume of 50% (D50) of particles which emerge when the tablet is suspended in water is 70 µm or less as determined by laser diffractometry, (2) the particle size by volume of 90% (D90) of the particles which emerge when the tablet is suspended in water is 130 µm or less as determined by laser diffractometry, and (3) the dissolution time of the tablet when the tablet is suspended in water according to the Japanese Pharmacopoeia - general testing methods - dissolution testing methods is 10 seconds or less.