Enteric Soft Capsule Shell with Integrated Polymer Matrix
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Solution Overview
Problem
Traditional soft gelatin capsules containing fish oil for cardiovascular health suffer from unpleasant side effects like fishy odor, gastric discomfort, and capsule integrity issues due to thermal sensitivity and coating problems, leading to a need for a cost-effective, stable, and non-coated enteric soft gel capsule that maintains elasticity and mechanical strength.
Innovation Solution
Development of oral pharmaceutical compositions comprising omega-3 polyunsaturated fatty acids in a gastric-resistant soft capsule shell made from a film-forming polymer, enteric polymers, plasticizers, and solvents, which provides robust gastric acid resistance and stability without the need for additional coatings, using a formulation that includes specific percentages of eicosapentaenoic acid, docosahexaenoic acid, and other fatty acids in ethyl ester forms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional enteric coating is applied to soft gelatin capsules, then gastric acid resistance is improved, but capsule shell integrity and appearance are deteriorated due to thermal sensitivity and coating defects
Solution Approach 1:
The patent merges the enteric coating function directly into the capsule shell matrix by incorporating acid-insoluble polymers (such as Eudragit L100) during the capsule formation process. This integration eliminates the need for separate coating layers, preventing coating delamination while maintaining gastric acid resistance. The combined structure ensures both protective function and shell integrity without thermal processing defects.
Solution Approach 2:
The capsule shell is formulated as a composite material containing gelatin, acid-insoluble polymers (Eudragit L100), and plasticizers in specific ratios. This composite structure provides both the mechanical properties of gelatin and the gastric acid resistance of the polymer, creating a unified material that resists stomach acid while maintaining shell strength and elasticity without requiring additional coating layers.
2Reliability
If enteric coating is applied to soft gelatin capsules, then gastric acid resistance is improved, but manufacturing complexity and cost are increased due to additional coating steps
Solution Approach 1:
The patent combines the enteric coating function with the capsule shell formation into a single manufacturing process. By incorporating acid-insoluble polymers during the capsule casting or extrusion step, the process eliminates separate coating operations, reducing manufacturing complexity while maintaining gastric acid resistance. This integration streamlines production without requiring additional equipment or process steps.
Solution Approach 2:
The acid-insoluble polymer is incorporated into the capsule shell matrix during the initial capsule formation process rather than applying coating later. This preliminary incorporation of the enteric function into the shell structure eliminates subsequent coating steps, simplifying the manufacturing process while ensuring consistent gastric acid resistance throughout the capsule shell.
3Reliability
If traditional enteric coating is applied to soft gelatin capsules, then gastric acid resistance is improved, but fishy odor and gastric discomfort are not effectively reduced
Solution Approach 1:
The patent introduces flavor masking agents (such as citrus or vanilla flavors) as intermediary substances within the capsule fill or shell matrix. These intermediaries counteract the fishy odor and improve patient acceptability. Combined with the acid-insoluble polymer matrix, this approach not only provides gastric acid resistance but also effectively masks unpleasant odors and tastes, addressing both protective and sensory requirements.
4Reliability
If enteric coating is applied to soft gelatin capsules, then gastric acid resistance is improved, but capsule appearance is deteriorated due to hazy and opaque coating
Solution Approach 1:
The patent merges the enteric function into the capsule shell matrix itself rather than applying an external coating layer. By incorporating acid-insoluble polymers during capsule formation, the shell maintains its inherent transparency and glossy appearance while providing gastric acid resistance. This integration eliminates the hazy, opaque appearance associated with traditional enteric coatings.
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 solution effectively reduces side effects such as fishy odor and gastric discomfort while maintaining the capsule's elasticity and mechanical strength, ensuring a stable and therapeutically effective delivery of omega-3 fatty acids for cardiovascular health without the drawbacks of traditional enteric coatings.
Implementation Method 1
a major limitation for consumers and patient compliance for the continued taking of these fish oil products is the presence of disruptive and unpleasant fishy odors associated with these traditional soft gelatin fish oil capsules
Implementation Method 2
made from a film-forming polymer, enteric polymers, plasticizers, and solvents, which provides robust gastric acid resistance and stability
Data Source
AI summary
Described herein are pharmaceutical compositions comprising polyunsaturated fatty acids and methods of manufacturing the same. In particular, described herein are pharmaceutical compositions comprising soft enteric capsules comprising omega-3 polyunsaturated fatty acids. The oral pharmaceutical compositions described herein are useful as nutritional supplements or for the treatment of cardiovascular-related diseases, such as hyper dyslipidemia and high triglyceride levels.