Abuse-Deterrent Opioid Multiparticulates via Segmented Gel Matrix
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Solution Overview
Problem
Current pharmaceutical compositions, such as sustained release formulations of opioids like oxycodone, are vulnerable to abuse due to their susceptibility to crushing and dissolution, allowing for rapid bioavailability through nasal or intravenous administration, which poses challenges for law enforcement and patient safety.
Innovation Solution
Development of abuse-deterrent pharmaceutical compositions in the form of multiparticulates with modified lipophilic drugs dispersed within water-insoluble excipients, which are resistant to rapid dissolution even when physically compromised, utilizing processes like spray congealing and coating with water-insoluble materials to control drug release over 6-24 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If sustained release formulations are used to provide therapeutic benefit over time, then the duration of action is improved, but the formulation becomes susceptible to crushing and grinding, allowing rapid abuse
Solution Approach 1:
The formulation is divided into multiple discrete beads or particles (multiparticulate system) rather than a single monolithic matrix. Each bead contains the opioid drug embedded within a polymer matrix, and the collection of beads is further embedded in a gel-forming matrix. This segmentation ensures that even if the outer formulation is crushed, individual beads maintain their structural integrity and controlled release properties, preventing rapid drug release for abuse purposes.
Solution Approach 2:
The formulation employs a composite structure with at least two different polymer matrices: an inner polymer matrix containing the opioid drug within each bead, and an outer gel-forming polymer matrix that encapsulates the beads. This composite material design provides both sustained release characteristics and resistance to mechanical disruption, as the gel matrix swells and gels upon contact with gastrointestinal fluids, protecting the individual beads from crushing while maintaining therapeutic drug release over time.
2Object-affected harmful factors
If the formulation is made resistant to crushing, then abuse potential is reduced, but the complexity of the formulation increases
Solution Approach 1:
The invention extracts the drug-containing core function into separate, self-contained beads that are then embedded in a protective gel matrix. This separation allows the beads to maintain their simple spherical structure with controlled release properties, while the gel matrix provides the crushing resistance. The modularity of this approach simplifies manufacturing compared to creating a single complex monolithic structure that would need to simultaneously provide both sustained release and mechanical protection.
Solution Approach 2:
Different regions of the formulation have different functional properties optimized for their specific roles: the inner polymer matrix of each bead is designed for controlled drug release, while the outer gel-forming matrix is designed for mechanical protection and swelling. This local optimization of properties allows each component to perform its function efficiently without requiring the entire formulation to be overly complex.
3Object-affected harmful factors
If aversive agents are added to deter abuse, then abuse potential is reduced, but harm to legitimate patients may increase
Solution Approach 1:
The invention converts the potential harm of formulation disruption into a benefit by designing a system where mechanical disruption (crushing, chewing) actually enhances the protective gel formation. When the formulation is subjected to mechanical stress, the gel matrix swells and gels more extensively, creating a more robust barrier that prevents rapid drug release. This transforms the abusive action into a mechanism that reinforces the abuse-deterrent properties without affecting legitimate patients who swallow the formulation intact.
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 compositions effectively deter improper administration by slowing drug release, reducing abuse potential without using aversive agents, ensuring a therapeutically effective dose is delivered while minimizing harm to legitimate patients.
Implementation Method 1
modified lipophilic drugs dispersed within water-insoluble excipients
Implementation Method 2
resistant to rapid dissolution even when physically compromised
Implementation Method 3
utilizing processes like spray congealing
Implementation Method 4
spray congealing
Implementation Method 5
coating with water-insoluble materials to control drug release
Data Source
AI summary
Tamper-resistance pharmaceutical compositions have been developed to reduce the likelihood of improper administration of drugs, especially drugs such as opioids. The tamper-resistant compositions retard the release of drug, even if the physical integrity of the formulation is compromised (for example, by chopping with a blade or crushing) and the resulting material is placed in water, snorted, or swallowed. However, when administered as directed, the drug is slowly released from the composition as the composition is passes through the GI tract.