Multi-Target Inhibitor Aqueous Suspensions for Sustained Local Delivery
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Solution Overview
Problem
Existing formulations of multi-target inhibitors face challenges in achieving stable, biocompatible, and effective delivery to local tissues such as eyes and prostate, with issues including thermodynamic instability, limited excipients, and difficulty in maintaining uniformity and sterility.
Innovation Solution
Development of aqueous suspension formulations comprising multi-target inhibitors with pharmaceutically acceptable vehicles, including suspending agents, surfactants, and buffers, which are stable, biocompatible, and terminally sterilizable, allowing for prolonged drug release and effective local delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-target inhibitors are formulated for local tissue delivery, then therapeutic efficacy at target site is improved, but formulation stability and biocompatibility deteriorate
Solution Approach 1:
The patent changes the physical-chemical parameters of the formulation by using aqueous suspension instead of conventional organic solvent-based formulations. This includes controlling particle size distribution, pH, osmolarity, and viscosity to achieve both stability and efficacy. The suspension formulation maintains drug stability while enabling local tissue delivery.
Solution Approach 2:
The patent employs composite formulation systems combining multiple excipients including suspending agents, wetting agents, buffers, and tonicity agents. This composite approach creates a synergistic system that addresses both stability requirements and biocompatibility needs for local tissue delivery.
2Ease of manufacture
If conventional formulations are used, then manufacturing simplicity is maintained, but delivery effectiveness to local tissues deteriorates
Solution Approach 1:
The patent segments the formulation into distinct functional components: active pharmaceutical ingredient, suspending agent, wetting agent, buffer system, and tonicity agent. This segmentation allows each component to be optimized independently while maintaining overall manufacturing simplicity through standardized preparation procedures.
3Reliability
If frequent dosing is administered, then therapeutic level maintenance is improved, but patient compliance and treatment burden worsen
Solution Approach 1:
The patent utilizes the sustained release characteristics of the aqueous suspension formulation to achieve periodic drug delivery at extended intervals. The formulation maintains therapeutic levels over prolonged periods, enabling less frequent dosing schedules while maintaining efficacy.
4Quantity of substance
If systemic administration is used, then drug distribution is improved, but local tissue concentration and side effect profile worsen
Solution Approach 1:
The patent applies local quality by formulating the drug as an aqueous suspension suitable for local tissue injection or instillation. This enables concentrated drug delivery directly to the target tissue while minimizing systemic circulation and associated side effects. The formulation is specifically designed for local bioavailability.
Data Source
AI summary
This disclosure relates to aqueous suspension formulations of multi-target inhibitors. These formulations can be locally administered to target tissues such as eyes, prostate, that may be solved by the present disclosure are to (1) provide an injectable dosage form that allows direct delivery of a multi-target inhibitor to the proximity of the diseased tissue, (2) be compatible with the tissue of the site of administration, (3) form a drug reservoir at the administration site to allow prolonged supply of the drug to the diseased tissue, and thus reduce dosing frequency, (4) the release rate of the drug from the reservoir is such that above therapeutic level of the drug in the diseased tissue is achievable, (5) have physicochemical properties that are suitable for clinical uses, (6) be terminally sterilizable so that safety risk due to contamination of micro-organisms can be minimized, and (7) have a stability profile suitable for long term storage and distribution.