Adrenergic Compound Stabilization via Antioxidant Mediation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Adrenergic compounds, such as epinephrine, are prone to light-induced, thermal, and oxidative degradation, leading to loss of potency and formation of undesirable compounds, which limits their shelf-life and stability in pharmaceutical formulations.
Innovation Solution
A pharmaceutical composition comprising an adrenergic compound and an antioxidant selected from bisulfite, metabisulfite, or sulfite compounds, with a molar ratio of 0.70-1.30 and pH range of 2.0-5.0, which enhances stability against auto-oxidation and thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If adrenergic compounds are stored in solution, then they remain available for medicinal use, but they undergo oxidation and degradation leading to loss of potency and formation of coloured compounds
Solution Approach 1:
The patent introduces an intermediary substance (antioxidant such as ascorbic acid, cysteine, or thioglycerol) that mediates between the adrenergic compound and oxidative degradation. This intermediary sacrificially undergoes oxidation itself, protecting the adrenergic compound from forming quinones and coloured compounds, thereby extending shelf-life while maintaining stability.
Solution Approach 2:
The patent creates an inert protective environment by adding antioxidants that consume oxygen and prevent oxidative reactions. The antioxidant substances establish a protective chemical atmosphere around the adrenergic compound, preventing contact with molecular oxygen and other oxidizing agents, thus preserving the compound's potency and preventing degradation.
2Reliability
If antioxidants are added to stabilise adrenergic compounds, then oxidation is prevented, but the composition becomes more complex and may cause adverse reactions
Solution Approach 1:
The patent optimizes parameters including the concentration of antioxidant (typically 0.01-1.0% w/v), pH value (usually 2-6), and temperature to achieve maximum stability with minimal additives. By carefully controlling these parameters, the patent reduces composition complexity while maintaining effective protection against oxidation.
3Duration of action of stationary object
If refrigeration is used to decrease deterioration rate, then shelf-life is prolonged, but the composition is less suitable for emergency use in various conditions
Solution Approach 1:
The patent modifies the chemical parameters of the composition by adding antioxidants and adjusting pH to achieve enhanced stability at ambient temperatures. This parameter change allows the composition to remain stable without requiring refrigeration, making it suitable for emergency use in various environmental conditions while maintaining extended shelf-life.
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 composition achieves improved stability and extended shelf-life, reducing the susceptibility to degradation, making it suitable for emergency use and minimizing adverse reactions due to lower antioxidant levels.
Implementation Method 1
Catechol compounds such as epinephrine are sensitive to oxidation to o-quinones... The rate of this reaction increases with pH, temperature and by the presence of metal ions
Implementation Method 2
the stabilised composition has a significantly improved shelf-life stability with a substantially reduced susceptibility of light induced, thermal and oxidative degradation
Data Source
AI summary
A stabilized composition comprising at least one adrenergic compound and at least one antioxidant selected from the group consisting of a bisulfite, a metabisulfite and a sulfite compound.