Segmented Mini-Tablet Coating for Swallowability
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Solution Overview
Problem
High-dose oral pharmaceutical preparations, such as large tablets, face challenges in being easily swallowable and having improved dissolution properties, particularly in masking unpleasant tastes and preventing delayed drug release in the gastrointestinal tract.
Innovation Solution
A coating composition comprising a combination of a first thickener like carboxyvinyl polymer or sodium alginate, a second thickener like xanthan gum, and hydroxypropylmethylcellulose, with a polyvalent metal compound, which forms a gel upon contact with saliva, enhancing swallowability and rapid drug release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a high-dose solid preparation is prepared as a single unit tablet, then the dosage is sufficient, but the tablet becomes large in size and difficult to swallow
Solution Approach 1:
The patent divides a high-dose preparation into multiple mini-tablets (each containing 1/4 to 1/10 of the total dose) instead of one large tablet. These mini-tablets are then coated with a gelling agent to improve swallowability. This segmentation allows the total dosage to be maintained while reducing individual tablet size to a manageable dimension for swallowing.
Solution Approach 2:
The patent introduces a gelling agent (such as carboxyvinyl polymer, xanthan gum, or sodium alginate) as a coating layer on the mini-tablets. This intermediary coating modifies the surface properties of the mini-tablets, providing a slippery sensation in the oral cavity that facilitates swallowing without affecting the drug release profile.
2Quantity of substance
If an orally fast-disintegrating tablet is grown in size to contain sufficient dosage, then the dosage is sufficient, but it causes a great feeling of a foreign body in the oral cavity after disintegration
Solution Approach 1:
Instead of using one large fast-disintegrating tablet, the patent segments the dosage into multiple small mini-tablets. Each mini-tablet is small enough to disintegrate quickly without creating a foreign body sensation, while the collective dosage meets the therapeutic requirement.
Solution Approach 2:
The gelling agent coating on the mini-tablets provides a slippery sensation that counteracts the foreign body feeling. This intermediary layer modifies the tactile experience in the oral cavity, making the disintegrated mini-tablets feel more comfortable despite their presence.
3Quantity of substance
If a single unit tablet is used for high-dose preparation, then the dosage is sufficient, but the unpleasant taste of the principal agent cannot be masked
Solution Approach 1:
Dividing the high-dose preparation into multiple mini-tablets increases the total surface area relative to volume, allowing the gelling agent coating to more effectively cover and mask the unpleasant taste of the principal agent across all tablet surfaces.
Solution Approach 2:
The gelling agent coating serves as an intermediary barrier between the unpleasant-tasting principal agent and the patient's taste buds. This coating layer masks the bitter or unpleasant taste while allowing the drug to be administered in a palatable form.
4Ease of operation
If a coating composition with high gelling agent content is used to improve swallowability, then the slipping property is improved, but the gel formation time is prolonged and adhesion to mucosa increases
Solution Approach 1:
The patent optimizes the concentration of gelling agent in the coating composition and adjusts formulation parameters (such as using specific types of carboxyvinyl polymer, xanthan gum, or sodium alginate with controlled molecular weights and viscosities) to achieve rapid gel formation within seconds, preventing prolonged formation time while maintaining good swallowability.
Solution Approach 2:
The patent uses composite coating compositions combining multiple gelling agents (such as carboxyvinyl polymer with xanthan gum or sodium alginate) to achieve synergistic effects that promote rapid gel formation while controlling adhesion properties to prevent excessive mucosa attachment.
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 coating composition improves the slipping property of tablets, effectively masks unpleasant tastes, and ensures rapid drug dissolution without delay, making high-dose preparations more manageable and effective.
Implementation Method 1
a coating composition comprising a combination of a first thickener like carboxyvinyl polymer or sodium alginate, a second thickener like xanthan gum, and hydroxypropylmethylcellulose, with a polyvalent metal compound, which forms a gel upon contact with saliva
Implementation Method 2
effectively masks unpleasant tastes
Implementation Method 3
ensures rapid drug dissolution without delay
Data Source
AI summary
It is an object to provide a coating composition, which is used for an orally-administered preparation, the administering property of which has been improved, and/or an easily administrable preparation that does not affect dissolution property. The aforementioned object can be achieved using a coating composition comprising a first thickener selected from the group consisting of a carboxyvinyl polymer and sodium alginate, a polyvalent metal compound, and at least one type of a second thickener selected from the group consisting of xanthan gum, guar gum and sodium alginate, with the proviso that when the first thickener is sodium alginate the second thickener is not sodium alginate, or using a coating composition comprising, as thickeners, hydroxypropylmethylcellulose and sugar or sugar alcohol having a solubility at 20°C of 30 or more.