Water-Soluble Cannabinoid Solid Dispersion for Bioavailability and Stability
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Solution Overview
Problem
Existing cannabinoid formulations face challenges with limited bioavailability, stability, and gastrointestinal side effects due to insolubility in water and reliance on lipid-based carriers and surfactants, leading to high production costs and reduced efficacy.
Innovation Solution
A water-soluble solid dispersion formulation comprising cannabinoids dispersed in a pharmaceutically acceptable hydrophilic polymeric matrix, such as Poloxamer 407, with an antioxidant like ascorbic acid, which forms a stable colloidal dispersion for improved bioavailability and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If lipid-based carriers and surfactants are used to dissolve cannabinoids, then solubility is improved, but bioavailability is limited and gastrointestinal side effects occur
Solution Approach 1:
The patent changes the physical-chemical parameters of the formulation by using phospholipids with specific molecular structures (natural phospholipids from soybean or sunflower lecithin) and controlling the oil-to-phospholipid ratio (9:1 to 1:1), transforming the formulation from conventional lipid-based carriers to a phospholipid complex system that enhances bioavailability while maintaining solubility
Solution Approach 2:
The patent creates a composite material system combining hydrophobic oil carriers (medium-chain triglycerides, soya lecithin) with amphiphilic phospholipids (phosphatidylcholine) to form a complex structure that simultaneously provides solubility enhancement and improved bioavailability, overcoming the limitations of single-component systems
2Stability of the object's composition
If high concentrations of surfactants and oil-based carriers are used to maintain formulation stability, then stability is improved, but gastrointestinal side effects increase
Solution Approach 1:
The patent optimizes the concentration parameters by using moderate amounts of phospholipids (0.1-10 mmol per kg of formulation) instead of high concentrations of conventional surfactants, and controls the oil carrier concentration to balance stability with reduced gastrointestinal irritation
Solution Approach 2:
The patent uses natural, biodegradable phospholipids from common sources (soybean or sunflower lecithin) that are metabolized by the body, replacing synthetic surfactants that accumulate and cause side effects, thus using naturally decomposable materials to reduce harmful impacts
3Stability of the object's composition
If water miscible co-solvents are used to enhance emulsion stability, then stability is improved, but toxicity increases
Solution Approach 1:
The patent extracts or removes water miscible co-solvents (ethanol, propylene glycol) from the formulation entirely, replacing their stabilizing function with phospholipid-based mechanisms that form stable emulsions through amphiphilic properties without the associated toxicity concerns
4Reliability
If self-emulsifying formulations are used to improve cannabinoid delivery, then bioavailability is enhanced, but production costs increase due to expensive high shear mixers
Solution Approach 1:
The patent employs self-emulsifying properties of the phospholipid-oil complex that automatically forms stable emulsions upon contact with gastric fluids, eliminating the need for expensive high shear mixing equipment and complex manufacturing processes while maintaining enhanced bioavailability
5Quantity of substance
If conventional lipid-based formulations are used to deliver cannabinoids, then solubility is achieved, but emulsification capability is lost in the gastro-intestinal track due to lipase enzyme interaction
Solution Approach 1:
The patent changes the chemical structure parameters by using phospholipids with specific head groups (phosphatidylcholine) that are resistant to lipase degradation, and controls the fatty acid chain length in oil carriers (medium-chain) to optimize both solubility and resistance to enzymatic breakdown in the gastrointestinal tract
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 achieves enhanced bioavailability, stability, and reduced gastrointestinal side effects, allowing for efficient oral, transdermal, and sublingual delivery of cannabinoids with a fast onset and improved safety profile.
Implementation Method 1
cannabinoids dispersed in a pharmaceutically acceptable hydrophilic polymeric matrix... which after contact with water forms stable aqueous solution
Implementation Method 2
forms a stable colloidal dispersion for improved bioavailability and stability
Implementation Method 3
antioxidant agent... improved in vivo absorption profile and faster onset
Data Source
AI summary
The present invention discloses the water-soluble cannabinoid-containing solid dispersion and method of preparation thereof. The solid dispersion of the invention comprises one or more cannabinoids as active ingredients, a hydrophilic polymeric carrier, an antioxidant and optionally the palatability-improving agent. The solid dispersion is suitable for oral delivery application in form of solid material or an aqueous colloidal dispersion or for transdermal delivery application.