Acetone-Extracted Gamboge Resin Formulation for Sustained Release
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Solution Overview
Problem
There is a need for a sustained-release formulation containing an acetone-extracted product of gamboge resin for medical applications, particularly to address the challenges of maintaining a constant drug level over an extended period.
Innovation Solution
A formulation comprising 25.00 wt % to 31.25 wt % of an acetone-extracted product of gamboge resin, combined with sodium lauryl sulfate, hydroxypropyl methylcellulose, microcrystalline cellulose, silicon dioxide, magnesium stearate, lactose, and dextrose, designed for controlled release over 12 to 72 hours, with a mean particle size of 10 μm, formulated into tablets using direct compression or dry granulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional immediate-release formulations are used, then the drug acts quickly, but the drug level cannot be maintained over an extended period
Solution Approach 1:
The patent applies parameter changes by modifying the physical and chemical properties of the formulation components. Specifically, it uses hydroxypropyl methylcellulose with different viscosity grades (400 cP, 1500 cP, 5000 cP) to control the release rate. The acetone-extracted product is processed to specific particle size ranges (4-8 mesh, 8-16 mesh) to optimize dissolution characteristics. These parameter modifications enable sustained release while maintaining reliable drug levels over 12-72 hours.
Solution Approach 2:
The patent employs composite materials by combining the acetone-extracted product of gamboge resin with hydroxypropyl methylcellulose as a sustained-release matrix. This composite formulation integrates the active pharmaceutical ingredient with the polymer excipient to create a system that provides controlled release. The combination of multiple components (API, HPMC, microcrystalline cellulose, silicon dioxide, magnesium stearate) creates a composite structure that achieves both extended duration and constant drug level.
2Productivity
If the drug is released quickly, then therapeutic effect is achieved rapidly, but the frequency of administration must be increased
Solution Approach 1:
The patent implements continuity of useful action through its sustained-release mechanism. The hydroxypropyl methylcellulose matrix continuously releases the acetone-extracted product over an extended period (12-72 hours), maintaining therapeutic drug levels without interruption. This continuous release action eliminates the need for frequent re-administration, reducing dosing frequency from multiple times daily to once or twice daily, thereby saving time and improving patient compliance.
3Duration of action of moving object
If the formulation uses complex release mechanisms, then sustained release is achieved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by creating a formulation where different components serve specific localized functions within the tablet matrix. Hydroxypropyl methylcellulose provides the sustained-release matrix function, microcrystalline cellulose offers structural support and compression strength, silicon dioxide prevents capping, and magnesium stearate facilitates ejection. Each component is optimized for its specific role, allowing complex sustained-release behavior to emerge from simple, well-defined local functions of individual ingredients rather than requiring complex overall formulation design.
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 effectively and sustainably releases the acetone-extracted gamboge resin over 24 hours, maintaining a consistent drug level, as demonstrated by in vitro dissolution tests.
Implementation Method 1
hydroxypropyl methylcellulose...designed for controlled release over 12 to 72 hours
Implementation Method 2
hydroxypropyl methylcellulose...sustainably releases the acetone-extracted gamboge resin
Implementation Method 3
sodium lauryl sulfate (SLS)...effective and sustainably releases the acetone-extracted gamboge resin
Implementation Method 4
as demonstrated by in vitro dissolution tests...maintaining a consistent drug level
Data Source
AI summary
A sustained-release formulation includes, based on the total weight of the sustained-release formulation, 25.00 wt % to 31.25 wt % of an active pharmaceutical ingredient (API) including an acetone-extracted product of gamboge resin, 4 wt % to 25 wt % of sodium lauryl sulfate (SLS), 15.63 wt % to 23.44 wt % of hydroxypropyl methylcellulose, 6.25 wt % to 13.38 wt % of microcrystalline cellulose, 0.63 wt % to 1.56 wt % of silicon dioxide, 0.63 wt % to 1.56 wt % of magnesium stearate, 25.00 wt % to 40.13 wt % of lactose, and 5.00 wt % to 7.81 wt % of dextrose.