Vilazodone Solid Dispersion Amorphous State Bioavailability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vilazodone hydrochloride has low solubility and bioavailability due to its poor absorption in the stomach, especially when taken on an empty stomach, leading to inadequate treatment of moderate to severe depression, and existing solid dispersion formulations do not adequately improve solubility and stability.
Innovation Solution
A vilazodone solid dispersion comprising vilazodone, a water-soluble polymer carrier material such as povidone, copovidone, or hydroxypropyl methylcellulose, and a surfactant like poloxamer 188, with specific weight ratios and preparation methods like spray-drying or hot melt extrusion to enhance solubility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vilazodone hydrochloride is administered orally under fasting conditions, then the drug is rapidly absorbed in the small intestine, but the low solubility in gastric juice and intestinal juice leads to poor oral bioavailability
Solution Approach 1:
The patent changes the physical and chemical parameters of vilazodone by converting it from a crystalline state to an amorphous state through solid dispersion technology. This parameter change increases the solubility of the drug in gastric juice and intestinal juice, thereby improving oral bioavailability under fasting conditions without requiring food administration.
Solution Approach 2:
The patent creates a composite material system by forming solid dispersions of vilazodone with carriers such as hydroxypropyl cellulose, hydroxypropyl methylcellulose, or polyethylene glycol. This composite approach enhances the solubility characteristics of the drug while maintaining its pharmacological activity, resolving the contradiction between low solubility and poor bioavailability.
2Productivity
If the proportion of carrier material in the formulation is increased to improve solubility, then the dissolution rate improves, but the stability of the later formulation may deteriorate
Solution Approach 1:
The patent optimizes the proportion parameter of carrier material in the solid dispersion formulation to a specific range (weight ratio of vilazodone to carrier material from 1:2 to 1:10). This parameter optimization achieves a balance where the dissolution rate is sufficiently improved while maintaining formulation stability, avoiding the extremes of too little carrier (poor dissolution) or too much carrier (instability).
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 vilazodone solid dispersion significantly increases oral bioavailability under fasting conditions, eliminates the food effect, and maintains stability during storage, making it suitable for clinical use in treating moderate to severe depression.
Implementation Method 1
preparing it into an amorphous state can increase its solubility
Implementation Method 2
The X-ray diffraction (XRD) pattern shows that the vilazodone hydrochloride is amorphous existing in the carrier material
Implementation Method 3
preparation methods like spray-drying or hot melt extrusion
Implementation Method 4
preparation methods like spray-drying or hot melt extrusion
Data Source
AI summary
Provided are a vilazodone solid dispersion, a preparation method therefor and a use thereof, wherein the vilazodone solid dispersion contains an active ingredient' vilazodone, a water-soluble polymer carrier material and a surfactant. The water-soluble polymer carrier material is selected from at least one of polyvidone, copovidone and hydroxypropyl methylcellulose. The vilazodone is present in the solid dispersion in a non-crystalline state. The solid dispersion has good stability and significantly improves the solubility and in-vitro dissolution rate of the vilazodone, thereby significantly increasing the oral bioavailability thereof. The vilazodone solid dispersion can be used for preparing vilazodone-related preparations.