Superabsorbent Polymer Matrix for Abuse-Deterrent Controlled Release
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Solution Overview
Problem
Current controlled release formulations for pharmaceutically active agents are vulnerable to abuse and misuse, particularly when compromised, leading to potential fatal consequences due to uncontrolled release of the active ingredient.
Innovation Solution
A controlled release formulation comprising a core with a superabsorbent material and a controlled release coat containing microparticles, which maintains prolonged release even when bisected or crushed, preventing dose dumping by forming a hard gel that traps the microparticles and resisting immediate release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If controlled release formulations are used to reduce dosing frequency, then convenience and adverse event profile are improved, but the formulation becomes vulnerable to abuse and misuse leading to fatal consequences
Solution Approach 1:
The formulation is divided into multiple microparticles distributed throughout the matrix, each containing a portion of the active ingredient. This segmentation ensures that even if the tablet is crushed or damaged, the active ingredient is released in small, controlled amounts rather than all at once, preventing the fatal consequences of complete dose dumping while maintaining the convenience of reduced dosing frequency.
Solution Approach 2:
A superabsorbent polymer acts as an intermediary between the microparticles and the gastrointestinal environment. This polymer controls the release of active ingredient from the microparticles through its swelling and gelation properties, providing an additional layer of protection against abuse while maintaining the controlled release profile needed for convenient dosing.
2Reliability
If deterrent formulations containing noxious substances are used, then deliberate abuse is prevented, but legitimate users who accidentally damage the tablet are exposed to harmful reactions
Solution Approach 1:
The superabsorbent polymer, which could potentially cause discomfort if released, instead provides a beneficial controlled release mechanism. When the tablet is damaged, the polymer swells and forms a gel that traps microparticles, converting what could be a harmful release into a controlled, gradual release that prevents both abuse and accidental harm.
Solution Approach 2:
The formulation uses its own structural components (superabsorbent polymer and microparticle distribution) to provide protection against abuse without requiring external deterrent substances. The system self-regulates the release of active ingredient based on physical conditions, protecting legitimate users from harmful reactions while preventing abuse.
3Reliability
If antagonist formulations are used to block therapeutic effect during abuse, then non-medical use is deterred, but legitimate patients are exposed to unnecessary drugs and potentially inhibited therapy
Solution Approach 1:
The harmful aspect of antagonist formulations (exposure to unnecessary blocking drugs) is completely removed by using a physical control mechanism instead. The superabsorbent polymer and microparticle distribution system controls release purely through physical means, eliminating the need for pharmacological antagonists and thus preventing exposure to unnecessary drugs while maintaining abuse deterrence.
Solution Approach 2:
The formulation uses a simple, single-use physical control system (superabsorbent polymer matrix) that performs its function and is then discarded, rather than using complex pharmacological antagonist systems that require continuous monitoring and management. This simplifies the approach while maintaining effectiveness.
4Ease of operation
If the controlled release coat is compromised by crushing or chewing, then immediate release of active ingredient occurs, but this can be prevented by forming a hard gel that traps microparticles
Solution Approach 1:
The superabsorbent polymer is positioned beforehand within the matrix to act as a cushioning protective element. When the tablet is crushed or exposed to damaging conditions, the polymer swells and forms a gel matrix that cushions and traps the microparticles, preventing their premature release and maintaining controlled release integrity even after physical compromise of the tablet structure.
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 effectively prevents rapid release of the active ingredient, maintaining controlled release properties across various media and conditions, reducing the risk of accidental or intentional misuse and ensuring prolonged release profiles.
Implementation Method 1
a core with a superabsorbent material and a controlled release coat containing microparticles, which maintains prolonged release even when bisected or crushed, preventing dose dumping by forming a hard gel that traps the microparticles
Implementation Method 2
forming a hard gel that traps the microparticles and resisting immediate release
Data Source
AI summary
Disclosed is a misuse preventative, controlled release formulation comprising a core comprising a first layer and a second layer. The core comprises a superabsorbent material (for example, polycarbophil), and a plurality of controlled release microparticles having a pharmaceutically active agent (for example, an opioid analgesic) disposed within the core. When crushed, either intentionally or accidentally, and exposed to an aqueous medium, the superabsorbent material present in the core swells to create a hard gel that traps the microparticles. The hard gel and microparticles provide controlled release of the pharmaceutically active agent. Also disclosed is a method of using the misuse preventative, controlled release formulation to deliver a pharmaceutically active agent to a mammal, for example, a human, in need thereof.