Abuse-Deterrent Pharmaceutical Matrix Using Gel-Forming Polymers
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Solution Overview
Problem
There is a growing need for effective methods and compositions to deter the abuse of pharmaceutical products, particularly orally administered drugs that are susceptible to tampering and conversion into illicit substances, as existing formulations are vulnerable to extraction and conversion into abused drugs through methods like the Nazi Method, Red Phosphorus Method, and Shake and Bake Method.
Innovation Solution
A therapeutic composition incorporating hydroxypropylcellulose, polyethylene oxide, and a disintegrant such as crospovidone, which forms a gel matrix upon contact with solvents, preventing the extraction and conversion of drugs into abused substances, thereby discouraging parenteral, inhalation, and oral abuse, as well as the illicit conversion of precursor compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional oral solid dosage forms are used, then ease of administration is maintained, but vulnerability to abuse and extraction increases
Solution Approach 1:
The patent employs a composite matrix system combining hydroxypropylcellulose and polyethylene oxide in specific ratios (10:1 to 1:10) to create a formulation that maintains oral dosing convenience while providing abuse deterrent properties. This composite approach allows the dosage form to function normally during legitimate use but resist tampering attempts.
Solution Approach 2:
The invention utilizes the gel-forming capability of hydroxypropylcellulose and polyethylene oxide, which changes physical state upon contact with solvents. This parameter change creates a gel matrix that prevents extraction of the active ingredient, thereby deterring abuse while maintaining ease of oral administration.
2Object-affected harmful factors
If extraction-resistant formulations are developed, then abuse deterrence is improved, but drug recoverability from solvents may be reduced
Solution Approach 1:
The formulation exploits the solvent-induced gelation of hydroxypropylcellulose and polyethylene oxide, transforming the matrix from a soluble state during normal digestion to an insoluble gel state upon contact with extraction solvents. This parameter change effectively prevents drug recovery through solvent extraction while maintaining therapeutic availability through the gastrointestinal tract.
Solution Approach 2:
The hydroxypropylcellulose-polyethylene oxide matrix acts as an intermediary barrier between the active ingredient and abusive routes of administration. During legitimate oral use, the matrix dissolves and releases the drug; during abuse attempts, it forms a gel that blocks extraction, thus mediating between therapeutic use and abuse prevention.
3Object-affected harmful factors
If gel-forming polymers are used to prevent extraction, then conversion to illicit substances is inhibited, but formulation complexity increases
Solution Approach 1:
The patent combines hydroxypropylcellulose and polyethylene oxide in a composite matrix system where each component contributes to the gel-forming property. This composite approach provides robust abuse deterrence through synergistic gelation while using well-established, commercially available polymer materials that simplify manufacturing compared to novel complex polymers.
Solution Approach 2:
The hydroxypropylcellulose-polyethylene oxide matrix system serves multiple functions: it provides structural integrity to the dosage form, controls drug release during legitimate use, and prevents extraction during abuse attempts. This multi-functionality reduces the need for additional separate components, thereby managing formulation complexity while achieving comprehensive abuse deterrence.
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 significantly reduces the recoverability of drugs from solvents, inhibiting their conversion into abused substances, thereby enhancing abuse deterrence and preventing the manufacture of illicit drugs, as demonstrated by reduced recovery rates in various extraction and conversion methods.
Implementation Method 1
at least 10% by weight hydroxypropylcellulose; polyethylene oxide
Implementation Method 2
forms a gel matrix upon contact with solvents, preventing the extraction
Data Source
AI summary
Effective methods and compositions to deter abuse of pharmaceutical products (e.g., orally administered pharmaceutical products) including but not limited to immediate release, sustained or extended release and delayed release formulations for drugs subject to abuse comprising at least 10% by weight hydroxypropylcellulose; polyethylene oxide; and a disintegrant selected from the group consisting of crospovidone, sodium starch glycolate and croscarmellose sodium; wherein the ratio of hydroxypropylcellulose to polyethylene oxide on a weight basis is between about 10:1 and 1:10.