Antioxidant-Stabilized Picosulfate Liquid for Complete Dosing
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Solution Overview
Problem
Existing formulations of picosulfate, such as those containing sodium picosulfate combined with magnesium oxide and citric acid, do not dissolve immediately and require stirring, risking incomplete dosing if not prepared correctly, and are unstable when stored in liquid form.
Innovation Solution
A stable liquid formulation of picosulfate is developed, incorporating an antioxidant and an osmotic laxative like magnesium citrate, maintaining stability for at least 10 days to 2 years at 20-25°C, with specific concentrations and ratios of components to prevent degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid formulations containing sodium picosulfate, magnesium oxide and citric acid are used, then the product provides a strong laxative effect, but the formulation does not dissolve immediately and requires stirring for 2-3 minutes, risking incomplete dosing
Solution Approach 1:
The patent changes the physical state parameter from solid to liquid formulation, and adjusts the chemical composition by incorporating antioxidants and specific pH buffers. This transforms the dissolution problem into a ready-to-use liquid solution that maintains stability while ensuring complete dosing without stirring requirements
Solution Approach 2:
The patent creates a composite liquid formulation combining sodium picosulfate with magnesium citrate, antioxidants (such as ascorbic acid or sodium metabisulfite), and pH buffering agents. This composite approach solves the dissolution issue while maintaining the laxative effect and improving dosing reliability
2Ease of operation
If liquid formulations containing picosulfate are prepared, then the product is ready for immediate consumption, but the formulation is unstable when stored or allowed to stand
Solution Approach 1:
The patent introduces antioxidants as intermediary substances that mediate between the picosulfate active ingredient and oxidative degradation. These antioxidants (ascorbic acid, sodium metabisulfite, BHA, BHT) act as protective intermediaries that sacrifice themselves to prevent oxidation of the active ingredient, thereby maintaining formulation stability during storage
Solution Approach 2:
The patent creates a chemically inert environment within the formulation by incorporating antioxidants that prevent oxidative reactions. This effectively creates a protected microenvironment that shields the picosulfate from degradation, allowing the liquid formulation to remain stable during storage while maintaining ready-to-use convenience
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 ensures consistent dosing by being ready-to-use and stable, reducing the risk of incomplete administration and maintaining effectiveness over extended storage periods.
Implementation Method 1
formulations containing picosulfate, e.g., sodium picosulfate, are unstable when stored or allowed to stand
Implementation Method 2
magnesium citrate, an osmotic laxative with a powerful cathartic effect
Data Source
AI summary
Oral liquid formulations are provided containing sodium picosulfate, magnesium citrate, citric acid, malic acid, and an antioxidant selected from potassium metabisulfite and sodium metabisulfite, wherein the antioxidant is present in the composition at a concentration of from about 0.002 M to about 0.1 M, and wherein the composition has a pH of from about 4.0 to about 6.5.