Triple-Layer Tamsulosin Tablet for Colon Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sustained-release formulations using swellable polymers like polyethylene oxide face challenges in maintaining stability and compatibility with excipients, leading to degradation and reduced efficacy, especially when stored under certain conditions, which is a concern for commercialization as per ICH guidelines.
Innovation Solution
A triple-layer tablet design is employed, where the intermediate layer contains D-mannitol and polyethylene glycol, minimizing interlayer separation and ensuring compatibility with tamsulosin, thereby controlling the release and maintaining stability regardless of storage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a matrix tablet is prepared by mixing a swellable polymer with a hydrophilic excipient, then water absorption capacity is improved, but structural stability and drug release control deteriorate
Solution Approach 1:
The tablet is divided into three distinct layers: an inner layer containing the drug and hydrophilic excipient for rapid water absorption, an intermediate layer providing structural support, and an outer layer with sustained-release properties. This segmentation allows each layer to perform its specific function optimally without interfering with others, resolving the contradiction between water absorption and structural stability.
Solution Approach 2:
Different regions of the tablet have different compositions and properties tailored to their specific functions. The inner layer has high hydrophilicity for rapid water uptake, the intermediate layer has balanced properties for structural integrity, and the outer layer has controlled porosity for sustained drug release. This local differentiation resolves the contradiction by assigning specific qualities to specific locations.
2Quantity of substance
If a sustained-release formulation uses only swellable polymers, then water absorption is improved, but drug release control in the lower digestive tract deteriorates
Solution Approach 1:
The three-layer structure separates the water absorption function (inner layer) from the drug release control function (outer layer). The inner layer rapidly absorbs water to swell and release the drug in the upper digestive tract, while the outer layer's controlled porosity and composition enable sustained release in the lower digestive tract where water availability is limited.
Solution Approach 2:
The formulation combines multiple materials with complementary properties: swellable polymers for water absorption, hydrophilic excipients for rapid dissolution, and sustained-release agents with controlled porosity for extended drug release. This composite approach allows the tablet to function effectively across different segments of the digestive tract.
3Ease of manufacture
If excipients are mixed with tamsulosin in a matrix formulation, then manufacturing simplicity is improved, but drug stability and degradation control deteriorate
Solution Approach 1:
The drug tamsulosin is isolated in the inner layer with specific excipients optimized for its stability and release, separated from other excipients in the intermediate and outer layers. This physical separation prevents incompatible interactions between excipients and the drug, maintaining stability while allowing each layer to be manufactured independently and then combined.
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 triple-layer tablet design enhances the stability and controlled release of tamsulosin, ensuring compliance with ICH guidelines by minimizing degradation products and maintaining effective blood concentration over time.
Implementation Method 1
an intermediate layer containing water soluble excipients to absorb a large amount of water in a rapid and continuous manner
Implementation Method 2
A triple-layer tablet design is employed, where the intermediate layer contains D-mannitol and polyethylene glycol, minimizing interlayer separation and ensuring compatibility with tamsulosin
Data Source
AI summary
The present invention relates to an orally administered sustained-release triple-layer pill containing tamsulosin or a pharmaceutically acceptable salt thereof, and more particularly, to a pill that is a structurally separated triple-layer pill for releasing and absorbing medicine in the lower digestive tracts including the colon, by quickly and continuously absorbing a large quantity of water by means of a water-soluble excipient in the middle layer, without losing tamsulosin activity. Disclosed is a sustained-release triple-layer tablet for oral administration including tamsulosin or a pharmaceutically acceptable salt thereof. Specifically, the sustained-release triple-layer tablet is structurally separated and includes an intermediate layer containing a water soluble excipient to absorb a large amount of water in a rapid and continuous manner. Therefore, the formulation can release the drug in the lower digestive tract including the colon and can be absorbed by the lower digestive tract without losing the activity of tamsulosin.