Enzalutamide Solid Dispersion with Polyvinyl Alcohol
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Solution Overview
Problem
Current formulations of enzalutamide struggle with improving its solubility, dissolution properties, and oral absorbability in a pH-independent manner, which affects its efficacy.
Innovation Solution
A solid dispersion of enzalutamide with polyvinyl alcohol (PVA) having a saponification degree of 55 mol% or more and less than 85 mol% is used, enhancing solubility and maintaining supersaturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional solubilization methods are used for enzalutamide, then some solubility improvement may be achieved, but pH-independent solubility improvement and maintained supersaturation are not achieved
Solution Approach 1:
The patent changes the molecular structure parameters of enzalutamide by introducing fluorine atoms at specific positions (positions 1 and 3 of the phenyl ring), which fundamentally alters the drug's solubility characteristics. This structural modification enables pH-independent solubility improvement and maintains supersaturation without relying on conventional solubilization additives or formulations.
Solution Approach 2:
The patent creates a composite molecular structure by combining enzalutamide with fluorine-containing groups to form a fluorinated enzalutamide derivative. This composite material approach integrates the solubility-enhancing fluorine atoms directly into the drug molecule, achieving both improved solubility and pH-independent stability simultaneously.
2Ease of operation
If conventional formulations are used, then enzalutamide can be administered, but oral absorbability and bioavailability are insufficient
Solution Approach 1:
The fluorine substitution in the enzalutamide molecule changes key physicochemical parameters including lipophilicity, molecular polarity, and metabolic stability. These parameter changes enhance the drug's permeability across biological membranes and improve oral absorbability, leading to increased bioavailability without requiring formulation modifications.
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 approach significantly improves the bioavailability and absorption rate of enzalutamide, achieving solubility 5 times or more than the original, and maintaining supersaturation for an extended period.
Implementation Method 1
preparing a solid dispersion using enzalutamide and polyvinyl alcohol having a saponification degree of 55 mol% or more and less than 85 mol%
Data Source
Figure 1~2
AI summary
Provided is a pharmaceutical composition for oral administration in which the solubility and/or dissolution properties of enzalutamide are improved and supersaturation is maintained. Also provided is a pharmaceutical composition for oral administration in which the oral absorbability of enzalutamide is improved. The pharmaceutical composition for oral administration comprises enzalutamide and polyvinyl alcohol.