Real-Time Monitoring of Tablet API Concentration and Bioavailability via Dissolution Kinetics in Simulated Stomach Fluid by T-Ray Transmission Technique.

This paper introduces a real-time, separationless method for monitoring Active Pharmaceutical Ingredient (API) concentration and dissolution kinetics in oral tablets using terahertz radiation (T-ray) transmission kinetics within simulated stomach fluid. Unlike conventional techniques such as High-Performance Liquid Chromatography (HPLC), which produce only discrete data points and require labor-intensive sample preparation, the T-ray approach offers continuous, quantitative measurement and monitoring. By leveraging the unique transmission and absorption characteristics of APIs in the T-ray region, this technique enables precise, real-time quantification of API concentration without physically separating excipients from the sample. The technique captures comprehensive kinetic profiles, providing deeper insights into dissolution processes and underlying molecular interactions. Its application can enhance Process Analytical Technology (PAT) by facilitating immediate, real-time quality control and supporting continuous manufacturing in the pharmaceutical industry. Additionally, the data generated can strengthen the modeling of in vitro-in vivo correlations (IVIVC), which is crucial for drug development and bioavailability assessment. Overall, the T-ray transmission technique represents a robust, efficient, and sustainable analytical tool for pharmaceutical research and production, offering significant advantages over traditional methods in both accuracy and operational speed.