Diclofenac Stick-Pack Oral Solution With Alkaline pH Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Diclofenac potassium, a potent NSAID, undergoes fast oxidative degradation when dissolved in water, and existing formulations lack chemical stability and palatability, necessitating new dosage forms for convenient patient use.
Innovation Solution
A liquid, single-dose, ready-to-use formulation of diclofenac potassium with a pH of 7 to 10, stabilized by a sugar-based aqueous means and an alkalizing agent, such as potassium bicarbonate, ensuring chemical and physical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If diclofenac potassium is dissolved in water to create an oral solution, then the drug becomes bioavailable and useful for therapy, but it undergoes fast oxidative degradation and loses chemical stability
Solution Approach 1:
The patent uses an alkalizing agent (sodium bicarbonate or potassium bicarbonate) as an intermediary substance that mediates between the diclofenac potassium and the aqueous environment. The bicarbonate buffer system maintains pH between 7.0-10.0, which prevents oxidative degradation while keeping the drug soluble and bioavailable for oral administration.
Solution Approach 2:
The invention changes the pH parameter of the aqueous solution from acidic/neutral to alkaline (pH 7.0-10.0) by adding alkalizing agents. This parameter change fundamentally alters the chemical environment to prevent oxidative degradation of diclofenac potassium while maintaining its solubility and therapeutic efficacy.
2Stability of the object's composition
If the pH is increased to 7-10 to prevent degradation, then chemical stability improves, but the palatability and patient acceptance may worsen due to alkaline taste
Solution Approach 1:
Flavoring agents and sweeteners are introduced as intermediary substances that mask the alkaline taste and improve palatability. These additives mediate between the alkaline chemical environment (necessary for stability) and the patient's sensory experience, making the formulation acceptable for oral administration.
3Ease of operation
If a liquid formulation is created for convenient administration, then ease of use improves, but the formulation complexity and stability requirements increase
Solution Approach 1:
The formulation is segmented into distinct functional components: diclofenac potassium (active ingredient), alkalizing agent (stability provider), flavoring agents (palatability enhancers), and sweeteners (taste improvement). This segmentation allows each component to perform its specific function while maintaining overall formulation stability and simplicity of manufacture.
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 maintains stability under accelerated conditions and provides a palatable solution for treating pain and migraine, conforming to pharmaceutical specifications.
Implementation Method 1
the molecule could be expected to undergo fast and irreversible oxidative degradation according to the auto-oxidation pathway
Implementation Method 2
a sugar-based aqueous means for solubilizing and stabilizing said formulation
Data Source
Figure 1
AI summary
Ready to use liquid formulations of diclofenac potassium are disclosed which are particularly well suited for packaging in stick-packs.