Polyethylene Glycol Sachet Formulation With Dry Mixing Stability
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Solution Overview
Problem
Existing polyethylene glycol-based laxative compositions face issues of instability due to degradation caused by moisture and temperature, leading to the formation of impurities like carboxylic acid and formaldehyde, and require complex processes that risk further decomposition.
Innovation Solution
A sachet formulation process involving dry mixing of polyethylene glycol with electrolytes like sodium chloride and sodium bicarbonate, followed by sieving and filling, ensures stability by avoiding compaction or compression, maintaining the integrity of polyethylene glycol and electrolytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polyethylene glycol is processed using conventional multi-step processes involving pulverization, sieving, and independent component preparation, then the formulation can be manufactured, but polyethylene glycol degradation occurs due to interactions with solvents and temperature from extra process steps, leading to impurity formation
Solution Approach 1:
The patent segments the manufacturing process into a single-step dry mixing operation rather than multiple sequential steps. The pre-mixed granulate from Example 1 is directly filled into capsules without intermediate processing, eliminating degradation risks associated with repeated handling, sieving, and solvent exposure.
Solution Approach 2:
The patent uses a carrier material (lactose or microcrystalline cellulose) as an intermediary substance to facilitate handling and processing. This carrier protects the polyethylene glycol from direct contact with degrading factors while maintaining the integrity of the active ingredient during manufacturing operations.
2Productivity
If polyethylene glycol is exposed to moisture and temperature increases during processing, then the formulation can be prepared, but the polyethylene glycol structure is disrupted and impurities such as carboxylic acid and formaldehyde are formed
Solution Approach 1:
The patent replaces wet processing methods with a dry mixing approach. By eliminating solvents and aqueous environments, the process substitutes mechanical mixing with controlled atmospheric conditions, preventing hydrolysis and thermal degradation of polyethylene glycol while maintaining manufacturing efficiency.
Solution Approach 2:
The patent creates a protected environment during processing by using dry, inert carrier materials and controlling atmospheric conditions during mixing and filling. This inert environment prevents moisture-induced degradation and thermal breakdown of polyethylene glycol structures.
3Device complexity
If conventional compression and compaction steps are used in the manufacturing process, then the formulation can be consolidated, but the polyethylene glycol structure is compromised leading to decreased stability and increased impurity formation
Solution Approach 1:
The patent inverts the conventional approach by using a pre-mixed granulate that is directly filled into capsules without compression. Instead of compressing the active ingredient, the process fills a pre-consolidated granulate mixture, thereby protecting polyethylene glycol from compaction-induced structural damage while achieving the desired formulation consolidation.
4Reliability
If a single-step dry mixing process is used to avoid polyethylene glycol degradation, then stability is maintained, but additional process steps for sieving and quality control are required
Solution Approach 1:
The patent merges multiple functions into a single dry mixing step that simultaneously achieves homogeneous distribution of active ingredients, proper granulate formation, and avoidance of degradation conditions. This consolidation eliminates the need for separate sieving and re-mixing steps, reducing overall process complexity while maintaining stability.
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 maintains stability and efficacy by preventing degradation, ensuring effective colon cleansing with enhanced shelf life and dosage consistency.
Implementation Method 1
When taken on its own, polyethylene glycol has an electrolyte leaching effect, and so it can lead to a drop in electrolyte levels in the patient. So, appropriate electrolytes are used in the present invention.
Implementation Method 2
The sachet formulation comprises from 85.0% to 98.0% by weight of polyethylene glycol with a molecular weight of 2500 to 4500, from 1.5% to 3.5% by weight of sodium chloride, from 0.01% to 1.0% by weight of potassium chloride and from 0.5% to 2.5% by weight of sodium bicarbonate.
Data Source
AI summary
The present invention relates to a sachet formulation comprising polyethylene glycol for the treatment of constipation, colon evacuation or colon cleansing. The invention further relates to a process of the formulation for effective and safe use.