Polymer Capsule for Targeted Colon Drug Release
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Solution Overview
Problem
Conventional solid dosage forms for drug delivery fail to maintain therapeutic drug levels over time, leading to insufficient efficacy or excessive drug dumping, and struggle to target specific gastrointestinal (GIT) sites due to rapid drug release and instability in gastric pH, which limits their effectiveness in treating conditions like inflammatory bowel disease and colonic cancer.
Innovation Solution
A polymer-based capsule formulation using sodium alginate with bi- and/or trivalent ions to control the release of drugs and bioactives, achieving specific release profiles such as immediate, extended, pulsatile, or delayed release, which remains intact during transit through the stomach and intestine, bursting to release drugs at the colon, thereby overcoming the limitations of existing technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional solid dosage forms are used, then the drug is rapidly dissolved and quickly builds up to maximum concentration in GIT, but this causes undulating concentration in systemic circulation and insufficient therapeutic duration
Solution Approach 1:
The patent changes the physical and chemical parameters of the dosage form by incorporating rate-controlling polymers and modifying the matrix composition to control drug release kinetics, transforming rapid dissolution into sustained release profiles that maintain therapeutic levels over extended periods
Solution Approach 2:
The patent uses composite materials consisting of the drug combined with rate-controlling polymers and other excipients in a matrix system, creating a multi-component formulation that enables controlled release and extends therapeutic duration while avoiding concentration fluctuations
2Reliability
If conventional dosage forms release high or low concentrations of drugs, then the patient's needs may not be met, but this leads to insufficient efficacy or excessive drug dumping
Solution Approach 1:
The patent modifies release parameters through polymer selection and formulation design to achieve consistent, controlled release rates that maintain drug concentrations within the therapeutic window, preventing both sub-therapeutic levels and excessive dumping that causes side effects
Solution Approach 2:
The controlled release system provides a feedback mechanism where the polymer matrix regulates drug release based on contact with gastrointestinal fluids, automatically adjusting the release rate to maintain stable concentrations and prevent harmful fluctuations
3Manufacturing precision
If various rate controlling polymers are added into the dosage form to achieve desired drug release profile, then the drug release can be controlled, but this increases the process and cost of therapy
Solution Approach 1:
The patent optimizes polymer concentration and type to achieve the desired release profile with minimal formulation complexity, adjusting parameters such as polymer molecular weight, crosslinking density, and composition ratios to balance control precision with manufacturing simplicity
Solution Approach 2:
The patent employs polymers that serve multiple functions simultaneously - providing structural matrix support, controlling drug release kinetics, and maintaining formulation stability - thereby achieving precise release profiles without proportionally increasing formulation complexity
4Manufacturing precision
If multiple processing operations are used for osmotic controlled release formulations, then the drug release can be controlled, but this increases the processing time
Solution Approach 1:
The patent combines multiple functions into a single integrated matrix system where rate-controlling polymers simultaneously provide structural support and release control, eliminating the need for separate coating and assembly operations required in osmotic systems, thereby reducing processing time while maintaining release precision
Solution Approach 2:
The patent uses a monolithic matrix formulation that integrates all release-control features within a single dosage form unit, avoiding the multi-step coating processes of traditional osmotic systems and reducing overall manufacturing complexity and time
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 formulation provides controlled and targeted drug delivery to specific GIT sites, protecting drugs from gastric degradation, achieving desired therapeutic levels and profiles, improving efficacy and patient compliance while reducing side effects and manufacturing costs.
Implementation Method 1
sodium alginate with bi- and/or trivalent ions chemically balanced cations to control the release of drug/bio-actives
Implementation Method 2
sodium alginate with bi- and/or trivalent ions chemically balanced cations
Implementation Method 3
many drugs (e.g. Omeprazole, esomeprazole, pantoprazole, etc.) are unstable in stomach pH thereby results in drug degradation and hydrolysis
Implementation Method 4
diffusion controlled
Data Source
AI summary
The present invention is related to polymer based formulation for release of drugs and bioactives at gastrointestinal tract specific sites including stomach, intestine and colon.