pH-Responsive Microcapsule Formulation for Pediatric Taste Masking
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Solution Overview
Problem
Existing pediatric medications, particularly those for children, face challenges in palatability and accurate dosing due to the lack of pediatric-specific formulations, leading to poor compliance and increased risk of under/over-dosing.
Innovation Solution
A microcapsule formulation with a drug-rich core encapsulated in a pH-responsive shell that prevents drug release in the oral cavity but dissolves at stomach pH, allowing controlled release and bioavailability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adult-approved liquid formulations are used for pediatric patients, then dosing flexibility is improved, but palatability deteriorates resulting in poor compliance
Solution Approach 1:
The formulation is segmented into discrete microcapsules (1-5 mm diameter) that can be individually dosed. Each microcapsule contains the drug core encapsulated in a pH-responsive shell, allowing the total dose to be divided into multiple manageable units suitable for pediatric patients of different ages and weights.
Solution Approach 2:
A pH-responsive shell acts as an intermediary between the foul-tasting drug core and the oral cavity. The shell remains intact at neutral pH (oral cavity conditions) to mask the taste, then dissolves at acidic pH (stomach conditions) to release the drug, thereby mediating the conflict between taste masking and drug delivery.
2Adaptability or versatility
If extemporaneous formulations are prepared by crushing tablets, then pediatric-specific dosing is improved, but bioavailability and palatability deteriorate
Solution Approach 1:
The microcapsules are pre-formulated with the drug encapsulated in a pH-responsive shell during manufacturing, preserving the original drug's bioavailability properties. This preliminary encapsulation action eliminates the need for crushing tablets, as the microcapsules can be directly dispersed in liquids or administered as chewable tablets with intact drug delivery characteristics.
3Object-affected harmful factors
If microcapsule liquid suspensions are prepared, then palatability is improved through taste masking, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process utilizes parameter changes, specifically temperature variations, to control the solubility and assembly of the pH-responsive shell materials. By melting the shell components at elevated temperatures and then allowing them to solidify as microcapsules cool, the process achieves complex encapsulation structures through relatively simple thermal parameter control rather than complex mechanical assembly.
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 ensures palatable and accurate dosing by masking foul tastes and providing controlled release profiles, enhancing compliance and safety in pediatric patients.
Implementation Method 1
The pH-responsive shell being insoluble at pH levels associated with the oral cavity, but soluble at pH levels associated with stomach or other region of the gastrointestinal system thereby preventing release of the active pharmaceutical ingredient until the appropriate pH is encountered
Data Source
AI summary
The present disclosure relates to a taste-masking microcapsule composition. The composition comprises a core portion encapsulated by a shell portion. The core portion comprises an active pharmaceutical ingredient (API) and one or more excipients. The shell portion comprises a hydrophobic matrix and a pH-responsive material. The microcapsule compositions prevent API release at the more neutral pH levels in the oral cavity, but upon exposure to pH levels of the stomach, the pH-responsive material becomes soluble thereby permitting release of the API.