Bilayer Beta-Lactam Tablet With Probenecid for Sustained Exposure

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Solution Overview

Problem

Existing β-lactam antibiotics struggle to maintain effective concentrations to combat infections and prevent antibiotic resistance, necessitating compositions and methods that optimize tissue concentrations.

Innovation Solution

A bilayer tablet design comprising a first layer of probenecid and a second layer of a β-lactam compound, prepared through specific compression methods, to enhance the pharmacokinetic profile and maintain effective antibiotic concentrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If conventional single-layer tablet formulations are used, then the formulation is simple to manufacture, but the antibiotic concentration cannot be maintained at effective levels for sufficient duration

Engineering Contradiction:

Improveduration of effective antibiotic concentrationVSAvoidtablet structure complexity

Core Design Contradiction:

Duration of action of moving objectVSDevice complexity

Solution Approach 1:

The tablet is divided into two distinct layers: a first layer containing probenecid and a second layer containing the beta-lactam antibiotic. This segmentation allows each layer to perform its specific function independently - probenecid inhibits renal excretion while the antibiotic provides therapeutic effect, thereby extending the duration of effective concentration without requiring complex multi-component systems within a single layer

Inventive Principle:

Principle #1Segmentation

2Reliability

If higher doses of beta-lactam antibiotics are administered to maintain effective concentrations, then therapeutic efficacy is improved, but the risk of antibiotic resistance increases

Engineering Contradiction:

Improvetherapeutic efficacyVSAvoidantibiotic resistance selection pressure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

Probenecid acts as an intermediary substance that modifies the pharmacokinetics of the beta-lactam antibiotic by inhibiting its renal excretion. This intermediary mechanism allows maintenance of effective antibiotic concentrations through enhanced retention rather than through increased dosing, thereby achieving therapeutic efficacy while reducing selection pressure for resistance

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If probenecid and beta-lactam are combined in a single layer, then the formulation is simpler, but the release profiles of both compounds cannot be optimized independently

Engineering Contradiction:

Improverelease profile control precisionVSAvoidtablet manufacturing complexity

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

By segmenting the tablet into two layers, each layer can be formulated and compressed with optimized parameters for its specific compound. The probenecid layer can be designed for sustained release while the antibiotic layer maintains stability, allowing independent optimization of release profiles without compromising manufacturing feasibility through the use of standard bilayer compression technology

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12544337B2Combinations of beta-lactam compounds and probenecid and uses thereof

Publication Date: 2026.02.10 ITERUM THERAPEUTICS INT LTD

AI summary

The present disclosure relates to bilayer tablets comprising a second layer comprising a β-lactam compound or a pharmaceutically acceptable salt thereof; and a first layer comprising probenecid or a pharmaceutically acceptable salt thereof. The present disclosure also relates to methods of treating or preventing a disease using the bilayer tablets.