Eszopiclone Tablet Coating for Taste Masking and Trace Detection
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Solution Overview
Problem
Current methods for detecting trace amounts of eszopiclone on the surface of tablets are inadequate, as they are either time-consuming, expensive, or not sensitive enough to accurately quantify the active pharmaceutical ingredient, leading to issues with film coating defects and unpleasant taste in patients.
Innovation Solution
A pharmaceutical composition coated with a water-soluble polymeric coating comprising hydroxypropyl methylcellulose, hydroxypropyl cellulose, or methyl cellulose, which masks the taste of eszopiclone and allows for rapid detection of trace amounts using liquid chromatography and tandem mass spectroscopy (LC-MS/MS) within 60 seconds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a film coating is applied to mask the bitter taste of eszopiclone, then the taste is masked, but trace amounts of active ingredient may remain on the surface causing bitter taste breakthrough
Solution Approach 1:
The patent changes the chemical composition parameters of the coating by incorporating specific surfactants (polysorbate 80, polyethylene glycol monolaurate) in defined concentrations (0.5-5% w/w) to modify the coating's surface properties and prevent active ingredient exposure while maintaining taste masking
Solution Approach 2:
The patent creates a composite coating formulation combining hydroxypropyl methylcellulose (film-forming polymer), surfactants (for surface modification and prevention of active ingredient exposure), and titanium dioxide (for opacity and additional taste masking) to achieve both taste masking and reliable coating integrity
2Measurement precision
If conventional analytical methods are used to detect trace amounts of active ingredient on tablet surface, then detection is possible, but the methods are time-consuming and not sensitive enough
Solution Approach 1:
The patent replaces conventional mechanical/chemical analytical methods (Raman mapping, XPS, conventional dissolution) with liquid chromatography-tandem mass spectrometry (LC-MS/MS) which provides rapid, sensitive detection of trace active ingredient at the ng/mL level within minutes
3Loss of substance
If the coating is made thinner to reduce material cost, then manufacturing cost is reduced, but the coating may not adequately mask the bitter taste
Solution Approach 1:
The patent changes the functional composition of the coating by incorporating surfactants that modify surface properties and enhance taste masking efficiency, allowing thinner coatings (reducing material usage) to achieve the same or better taste masking performance
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 composition effectively masks the bitter taste of eszopiclone and enables accurate detection of trace amounts on the surface of tablets, improving patient experience and coating efficiency while providing a rapid and cost-effective method for quality control.
Implementation Method 1
coated with a water-soluble polymeric coating
Implementation Method 2
liquid chromatography and tandem mass spectroscopy (LC-MS/MS)
Data Source
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AI summary
Coated tablets of (6-(5-chloro-2-pyridyl)-5-[(4-methyl-1- piperazinyl)carbonyloxy]-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazine) are provided. The tablets minimize the perceived bitterness of the medicament. A method for analyzing instantaneous dissolution of sub-microgram quantities of core material is also disclosed.