High-Drug-Load Coatable Cores With External Lubrication
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Solution Overview
Problem
Existing delayed release formulations face challenges with high drug load, low friability, high friability, slow disintegration, and inadequate lubrication leading to tablet ejection issues, particularly for drugs like 5-ASA, necessitating multiple tablets for daily dosing.
Innovation Solution
A method involving granulation, blending with a disintegrant, and external lubrication to produce a coatable core with a high drug load of at least 70 wt%, using a compression process that includes a film-forming enteric polymer coating for targeted intestinal release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a high drug load of at least 70 wt% is achieved in the coatable core, then the dosing frequency is reduced and patient compliance is improved, but the friability of the tablet increases and manufacturing precision becomes more difficult to control
Solution Approach 1:
The patent applies parameter changes by optimizing the compression force and lubricant concentration to achieve the desired balance between high drug load and acceptable friability. By adjusting these parameters during the compression process, the formulation maintains both high drug content and sufficient mechanical strength.
Solution Approach 2:
The patent uses an intermediary lubricant system that mediates between the high drug load requirement and the friability constraint. The lubricant acts as a mediator during compression, enabling high drug load while controlling tablet friability through optimized lubricant selection and application.
2Reliability
If external lubrication is used during compression to reduce friability, then the tablet ejection issues are resolved and manufacturing precision is improved, but the device complexity increases and production time is extended
Solution Approach 1:
The patent applies preliminary action by pre-coating the compression blend with lubricant before compression. This preliminary lubrication step prevents tablet ejection issues and reduces friability during the subsequent compression process, eliminating the need for complex in-process adjustments.
Solution Approach 2:
The patent replaces complex mechanical lubrication systems with a simpler pre-coating approach. Instead of using complex in-process lubrication mechanisms during compression, the formulation uses a pre-applied lubricant layer that achieves the same protective effect with reduced device complexity.
3Speed
If the compression process is optimized for high drug load, then the disintegration time is reduced and drug release is accelerated, but the hardness of the tablet decreases and manufacturing precision becomes more difficult to control
Solution Approach 1:
The patent applies parameter changes by optimizing compression force and lubricant concentration to achieve the desired balance between rapid disintegration and sufficient hardness. By adjusting these parameters, the formulation maintains both fast drug release and adequate mechanical strength.
Solution Approach 2:
The patent uses composite material principles by combining the drug substance with optimized excipients and lubricants in specific ratios. This composite formulation enables rapid disintegration while maintaining sufficient hardness through the synergistic interaction of multiple materials.
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 cores with low friability, high hardness, rapid disintegration, and fast drug release, reducing dosing frequency and improving patient compliance by maintaining drug integrity and efficacy.
Implementation Method 1
A commonly used coating is one containing ionizable carboxylic groups. At higher pH levels, the carboxylic groups ionize, allowing the polymer coatings to disintegrate or dissolve.
Data Source
AI summary
A method produces a coatable core for a modified release drug formulation for oral administration. The coatable core has a high drug load of at least 70 wt % based on the total weight of the coatable core. The method involves the steps of granulating a composition containing a drug and at least one binder to form granules; blending the granules with a pharmacologically acceptable disintegrant and optionally, one or more additional pharmacologically acceptable excipients, to form a compression blend, wherein the disintegrant is present in an amount from about 0.5 wt % to about 5 wt %, based on the total weight of the coatable core; and compressing the compression blend using an external lubrication compression method to form a coatable core.