Sustained Release LAAM Formulations via Hydrophobic Ion-Pairing
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Solution Overview
Problem
Existing formulations of levo-alpha-acetylmethadol (LAAM) and its metabolites require frequent dosing, leading to patient compliance issues due to the need for multiple administrations per week.
Innovation Solution
Development of sustained release formulations containing LAAM, nor-LAAM, or dinor-LAAM as part of a hydrophobic ion-pairing complex associated with biodegradable polymeric microparticles, allowing for extended release over several weeks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LAAM is administered orally multiple times per week to maintain therapeutic effect, then the therapeutic efficacy is maintained, but patient compliance deteriorates due to frequent dosing requirements
Solution Approach 1:
The drug is segmented into microparticles that can be embedded in a植入able device, allowing the therapeutic agent to be divided into controlled release units rather than requiring frequent oral administration
Solution Approach 2:
The drug is pre-loaded into microparticles and implanted in advance, creating a sustained release system that eliminates the need for frequent dosing decisions and administration actions by the patient
2Ease of operation
If LAAM is formulated for sustained release to reduce dosing frequency, then patient compliance improves, but the complexity of the formulation increases
Solution Approach 1:
The drug is converted into a hydrophobic ion-pairing complex to enable encapsulation in biodegradable polymeric microparticles, changing the physical-chemical parameters to achieve sustained release while maintaining compatibility with the polymer matrix
Solution Approach 2:
The formulation uses composite microparticles combining biodegradable polymers with hydrophobic ion-pairing complexes of LAAM, creating a multi-component system that provides both sustained release and biocompatibility
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 sustained release formulations provide a therapeutic effect over an extended period, reducing the frequency of administration and improving patient compliance, while maintaining the therapeutic efficacy of the active ingredients.
Implementation Method 1
the HIP complex is associated with the microparticles (e.g., encapsulated within or otherwise connected to the microparticles by ionic bonding or the like)
Implementation Method 2
biodegradable polymeric microparticles
Data Source
AI summary
A method of delivering an active ingredient to a subject in need thereof is provided. The method includes administering to the subject a therapeutically effective amount of a formulation comprising biodegradable, polymeric microparticles and an active ingredient selected from the group consisting of levo-alpha-acetylmethadol (LAAM), nor-LAAM, and dinor-LAAM, wherein the active ingredient is part of a hydrophobic ion-pairing (HIP) complex and wherein the HIP complex is associated with the microparticles. Sustained release formulations containing an active ingredient are also provided.