Pharmaceutical Continuous Manufacturing (PCM) with PAT

The Key to Successful Continuous Manufacturing

Pharmaceutical continuous manufacturing (PCM) is a process where raw materials continuously enter the production line, enabling the uninterrupted, high-quality production of finished products without hold times. All testing and processing steps are performed inline. This continuous approach contrasts sharply with traditional batch production methods, which currently dominate drug manufacturing.

Unlike batch manufacturing, which treats pharmaceutical production as a series of distinct, siloed events, continuous processes execute all reaction chemistry, testing, and final processing inline. Process analytical technology (PAT) is a critical component of successful continuous production, ensuring in-process quality and regulatory compliance.

Pharmaceutical continuous manufacturing PAT
PAT Supporting Pharmaceutical Continuous Manufacturing (PCM)

The FDA endorses continuous manufacturing through science- and risk-based approaches. METTLER TOLEDO offers advanced technologies designed to facilitate the successful implementation of continuous pharmaceutical manufacturing.

PAT-Enabled Automated Feedforward Control: An Application to the Continuous Manufacture of Apremilast.

Hsieh, H-W, Griffin, D.J. Nambiar, A.M.K., Sarkar, N., Ismail, H.Y., Saigal, K., Shen, D.E., Goudas-Salomon, N., Wimalasinghe, R., Zeng, A., Thiel, O.R. and Beaver, M.G. (2024). PAT-Enabled automated feedforward control: An application to the continuous manufacture of Apremilast. Org. Process Res. Dev., 28(7), 2844–2853. https://doi.org/10.1021/acs.oprd.4c00155

Scientists at Amgen developed a continuous manufacturing process for the final step in the synthesis of apremilast. This work describes a closed-loop controller utilizing two ReactIR PAT systems to monitor incoming feed concentrations. By adjusting the feed flow rate based on real-time data, the system maintains optimal yield during continuous production. This lab-scale setup simulates a manufacturing platform and demonstrates the value and requirements of PAT-based closed-loop control in continuous processes.

Continuous Flow Reaction Of Highly Exothermic Reaction

Integrated Continuous Crystallization–Spherical Agglomeration (CCSA) Process for the Intensified Manufacturing of Atorvastatin Calcium

Parvaresh, R., Ferdoush, S., Kshirsagar, S., Gonzalez, M. and Nagy, Z.K. (2024). Integrated continuous crystallization–Spherical agglomeration (CCSA) process for the intensified manufacturing of atorvastatin calcium. Crystal Growth & Design, 24(12), 5355-5364. https://doi.org/10.1021/acs.cgd.4c00587

This article details a two-stage continuous MSMPR system integrating continuous crystallization with spherical agglomeration to improve atorvastatin calcium (ASC) crystallization. Three interconnected vessels carry out sequential steps: the first holds ASC/methanol mother liquor, the second crystallizes ASC, and the third performs agglomeration using ethylene chloride. FBRM probes provide real-time particle formation and agglomeration monitoring. Decoupling nucleation and growth from agglomeration enhances particle size and morphology, improving downstream processing efficiency and enabling the elimination of certain steps like granulation. The intensified process allows customization of product properties for maximum bioavailability and processing efficiency.

FTIR Spectroscopy for Flow Chemistry

FTIR Spectroscopy for Flow Chemistry

Journal Articles to Review Before Developing Your Continuous Process

Acid Catalyzed Transfer Hydrogenation

Acid Catalyzed Transfer Hydrogenation

Continuous-flow Catalytic Asymmetric Hydrogenations: Reaction Optimization Using FTIR Inline Analysis

Reaction Analysis Guide

Real-Time Reaction Analysis Guide

A Guide Reviewing the Advantages and Importance of Real-Time Reaction Analysis—A Key Element in Any PAT Strategy

Flow Chemistry as a Powerful Tool to Enable the Scale-up of APIs

Webinar: Flow Chemistry as a Powerful Tool to Enable the Scale-up of APIs

This webinar reviews how a continuous flow process was developed as a safe, cost-effective, and scal...

Flow and Batch Chemistry Monitoring

Flow and Batch Chemistry Monitoring

Charles Goss presents examples illustrating how GlaxoSmithKline (GSK) monitors flow and batch chemis...

The Power of PAT at Scale in an API Pilot Plant

The Power of PAT at Scale in an API Pilot Plant

James Marek and Eric Moschetta of AbbVie present "The Power of PAT at Scale in an API Pilot Plant".

continuous flow chemistry for api manufacturing

Continuous Flow Chemistry for API Manufacturing

Presented by Dr. Frederic Buono of Boehringer-Ingelheim, this on-demand webinar reviews continuous f...

Continuous Flow Chemistry Using PAT

Development of Continuous Flow Chemistry Using Online PAT Analysis

Eric Fang of Snapdragon discusses how continuous flow chemistry is applicable across the entire valu...

Continuous Flow Process Optimization and Control Using Multiple Orthogonal PAT

Webinar: Continuous Flow Process Optimization and Control Using Multiple Orthogonal PAT

In this webinar, we will introduce a modular system created using a standard Vapourtec platform coup...

What is continuous manufacturing in pharmaceuticals?

Pharmaceutical continuous manufacturing (PCM) is a process where raw materials continuously enter a production line, enabling uninterrupted, high-quality production of finished goods without hold times. All testing and processing steps are performed inline, ensuring seamless operation.

What is the difference between batch and continuous manufacturing in pharmaceuticals?

Batch manufacturing treats pharmaceutical production as a series of separate, discrete events, whereas continuous manufacturing integrates all reaction chemistry, testing, and final processing inline into a streamlined process.

What are the advantages of pharmaceutical continuous manufacturing?

  • Eliminates hold times.
  • Enables rapid response to market changes.
  • Allows execution of complex or hazardous chemistries that are difficult in batch processes.
  • Consolidates production within a single facility, reducing bottlenecks.
  • Reduces operational costs.
  • Achieves higher quality and improved yield.

Why is the use of process analytical technology (PAT) important in PCM?

PAT is critical for pharmaceutical continuous manufacturing as it provides continuous, real-time monitoring, and measurement of Critical Process Parameters (CPPs) and Critical Quality Attributes (CQAs). This ensures process reliability and stability while supporting a Quality by Design (QbD) strategy. It enables instant detection of performance variations, identifies their sources, and allows proactive interventions, minimizing rework or rejection of the final product.

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