Anti-Arrhythmic Tablet Composition Balancing Stability and Dissolution

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing anti-arrhythmic drugs like 1-(3-methanesulfonamido benzyl)-6-methoxy, 7-benzyloxy-1,2,3,4-tetrahydroisoquinoline suffer from instability under moisture and heat, affecting their dissolution rate and hindering industrialized mass production.

Innovation Solution

A pharmaceutical composition comprising 1-(3-methanesulfonamido benzyl)-6-methoxy, 7-benzyloxy-1,2,3,4-tetrahydroisoquinoline with specific ratios of lactose, microcrystalline cellulose, and pre-gelatinized starch, along with disintegrating and lubricating agents, is formulated through wet granulation and drying processes to enhance stability and rapid dissolution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional anti-arrhythmic pharmaceutical compositions are used, then the drug can treat ventricular tachycardia and ventricular fibrillation, but the composition decomposes under moisture and heat, reducing stability

Engineering Contradiction:

ImprovestabilityVSAvoiddecomposition under moisture and heat

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces pre-gelatinized starch as an intermediary carrier that protects the active ingredient from moisture and heat. The pre-gelatinized starch forms a protective matrix that prevents direct exposure of the drug to harmful environmental factors, thereby maintaining stability without compromising therapeutic effect

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a composite pharmaceutical composition by combining the active ingredient with multiple excipients including pre-gelatinized starch, lactose, and microcrystalline cellulose in specific ratios. This composite structure provides both stability protection and controlled dissolution properties that individual components cannot achieve alone

Inventive Principle:

Principle #40Composite materials

2Reliability

If the composition is designed for high stability, then the drug maintains efficacy under various conditions, but the dissolution rate decreases

Engineering Contradiction:

ImprovestabilityVSAvoiddissolution rate

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent applies local quality by using pre-gelatinized starch specifically in the granulation core to provide stability, while incorporating disintegrating agents on the surface and in the matrix to ensure rapid dissolution. This spatial differentiation of functions allows simultaneous achievement of stability and fast dissolution

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent optimizes the granulation process parameters including binding agent concentration, granulation time, and drying conditions to create a porous granule structure. This parameter optimization enables the granules to maintain structural integrity for stability while creating channels that facilitate rapid water penetration and drug dissolution

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If the composition uses simple excipients, then the manufacturing process is simplified, but the tablet characteristics and dissolution performance are compromised

Engineering Contradiction:

Improvemanufacturing process simplicityVSAvoidtablet characteristics

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent establishes specific parameter ranges for excipient ratios (pre-gelatinized starch 10-30%, lactose 20-40%, microcrystalline cellulose 10-30%) and granulation conditions that balance manufacturing simplicity with product quality. These optimized parameters enable consistent tablet characteristics without requiring complex manufacturing procedures

Inventive Principle:

Principle #35Parameter changes

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 a dissolution rate of 80% or higher in 30 minutes and maintains stability under various conditions, facilitating industrial production and ensuring consistent drug performance.

Implementation Method 1

a pre-gelatinized starch, which account for 30% to 80% of the total weight of the composition

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

The method includes: a) mixing and sieving an active ingredient, lactose, microcrystalline cellulose and a pre-gelatinized starch; b) performing wet granulation

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS12622902B2Anti-arrhythmic pharmaceutical composition and preparation method therefor

Publication Date: 2026.05.12 JIANGSU KANION PHARMA CO LTD

AI summary

An anti-arrhythmic pharmaceutical composition. The pharmaceutical composition includes: an active ingredient, including 1-(3-methanesulfonamido benzyl)-6-methoxy, 7-benzyloxy-1,2,3,4-tetrahydroisoquinoline or a pharmaceutically acceptable salt thereof; and auxiliary materials, including lactose, microcrystalline cellulose and a pre-gelatinized starch, which account for 30% to 80% of the total weight of the composition. The composition has a good dissolution effect and excellent stability, and can be better applied to clinic.