Transdermal Formulation Using Osmolyte and Vasoactive Agent
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Solution Overview
Problem
Transdermal drug delivery faces challenges in penetrating the skin's barriers, particularly the stratum corneum, to achieve systemic or localized drug deposition, due to the skin's natural defenses and structural layers.
Innovation Solution
A formulation combining a vasoactive agent, an osmolyte, and an active ingredient is used to create a condition of hypertonicity and increased blood flow in the skin, enhancing the penetration of the active ingredient through the skin layers by synergistically working with osmotic and vascular changes, potentially aided by a transpiration barrier and penetration enhancers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transdermal delivery is used to avoid gastrointestinal metabolism and improve patient compliance, then patient convenience and compliance are improved, but penetration of skin barriers becomes a key challenge
Solution Approach 1:
The patent uses a composite formulation containing multiple components working together: vasoactive agents (to increase blood flow), osmolytes (to create hypertonicity and draw water into the stratum corneum), penetration enhancers, and the active ingredient. This composite approach allows the formulation to simultaneously address multiple barriers to transdermal delivery, resolving the contradiction between ease of operation and penetration difficulty.
Solution Approach 2:
The formulation changes the physical and chemical parameters of the skin environment temporarily: vasoactive agents alter blood flow parameters, osmolytes change osmotic pressure and water content in the stratum corneum, and penetration enhancers modify the lipid organization and fluidity of skin barriers. These parameter changes facilitate drug penetration while maintaining simple application methods.
2Productivity
If the stratum corneum is penetrated to achieve systemic or localized drug deposition, then drug delivery effectiveness is improved, but the skin's natural barrier function is compromised
Solution Approach 1:
The formulation applies preliminary actions to the skin before drug deposition: vasoactive agents are applied to increase blood flow in advance, osmolytes are applied to create hypertonicity and draw water into the stratum corneum beforehand, and penetration enhancers are applied to temporarily modify skin barrier properties. These preliminary actions prepare the skin for enhanced drug penetration while minimizing damage to the barrier function.
Solution Approach 2:
The patent uses intermediary substances to facilitate drug penetration without directly damaging the skin barrier: osmolytes act as intermediaries by drawing water into the stratum corneum to create hydration pathways, penetration enhancers act as intermediaries by temporarily disrupting lipid organization to allow drug passage, and vasoactive agents act as intermediaries by increasing blood flow to enhance drug uptake. These intermediaries protect the skin barrier while enabling efficient drug delivery.
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 effectively increases the permeation of active ingredients into the epidermis, dermis, or systemic circulation, allowing for enhanced therapeutic effects, including the delivery of anti-neoplastic agents and other bioactive substances across the skin, overcoming the natural barriers and improving drug delivery efficiency.
Implementation Method 1
The formulation is sufficiently hygroscopic to create a condition of hypertonicity when absorbed by the skin
Implementation Method 2
the vasoactive agent causes an increased flow of blood in the skin
Implementation Method 3
enhance penetration of the active ingredient through the skin layers by synergistically working with osmotic and vascular changes
Data Source
AI summary
A formulation and method for delivery of bioactive substances when applied to, or within, the skin or other exterior region of a mammal. for example, a patient, includes a vasoactive agent; an osmolyte; and an active ingredient. The formulation is sufficiently hygroscopic so as to create a condition of hypertonicity when absorbed by the skin. When the formulation is applied to the skin, the vasoactive agent can be delivered to the dermis so as to contact the vasculature of a patient.