Egal wie knifflig Ihr Produkt ist – wir beherrschen es

Rottendorf Pharma widmet sich voll und ganz der Fertigung, Verpackung und Formulierung fester Darreichungsformen. Auf diesem Gebiet haben wir viel Pionierarbeit geleistet und lösen ständig neue komplexe und anspruchsvolle Aufgaben zusammen mit unseren Kunden. Deshalb ist Rottendorf ein Partner auf Augenhöhe.

Die Kunden profitieren von Rottendorfs Konzept des Total Technological Mastering (TTM), denn sie brauchen kein Know-how über Produkttechnologie und technische Abläufe bereitzustellen. Das Team von Rottendorf besteht aus hervorragend ausgebildeten Mitarbeitern, die das Produkt beispielsweise von der Upscaling-Phase über die Festlegung des Fertigungsprozesses bis zum kommerziellen Maßstab begleiten. Mit unserem Fachwissen wickeln wir alles von der Entwicklung bis zur Herstellung ab.

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Ihrer Produkte durch höchste Kompetenz in Pharmazeutischer Technologie

Egal wie knifflig Ihr Produkt ist –
wir beherrschen es

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Wir produzieren Produkte nicht nur, wir
beherrschen sie ganzheitlich…

Total Technological Mastering (TTM) bedeutet für Rottendorf:

  • während des Technologie-Transfers die galenischen Eigenschaften des Produkts und alle kritischen Parameter genau zu verstehen.
  • technisches Know-how zur Lösung von Problemen im Zusammenhang mit der Produktkonzeption bereitzustellen.
  • Prozessverbesserungspotenziale zu ermitteln und entsprechende Lösungen zu erarbeiten.
  • technische Fehlerdiagnosen bei Produkt- und Fertigungsproblemen aller Art erfolgreich durchzuführen.

Somit wird vom Kunden kein Fachwissen über Produkt-Technologie und technische Operationen gefordert.

Case study

The Challenge: Getting Ready For Clinical Trials

Recently, we were approached by a mid-size pharmaceutical company who had an active pharmaceutical ingredient (API) they wanted to begin testing in clinical trials.

The challenge
The challenge was, looking for a contract provider equipped to scale its formula for 5 kg development batches into 80 kg trial batches. For this pharma client, the deciding factor in selecting Rottendorf was our ability to adapt from lab-scale equipment to larger batch sizes and optimize the process for clinical trial batches - with the ultimate goal of commercial distribution. We always optimize for the end-goal of commercial production. For the client, our ability to support their present needs as well as their future needs, following product approval, was critically important.

From Technical to Clinical Batches in a Compressed Timeframe
We immediately got to work on a technical trial batch and then adapted the manufacturing process to our equipment and larger batch sizes. To work efficiently under the constraint of a limited timeframe, we saved time by manufacturing both the technical batch and GMP clinical batches on the same equipment.

formula for 5 kg development batches into 80 kg trial batches

The Solution

Focusing on potential scale-up issues.

To accomplish process scale-up from 5 kg to 80 kg, we narrowed our focus to those aspects of the process where potential scale-up issues were identified. Specifically, the development team at Rottendorf determined ways to address issues that arose during:


Extrudate milling


Hot melt extrusion

The Challenge

In hot melt extrusion, a new material, the extrudate, is formed when forced through an orifice or die under controlled conditions, like temperature, mixing, feed-rate and pressure. Unlike simple extrusion, in hot melt extrusion, polymer, drug & excipient blends are completely mixed in the molten state, with the molten polymer acting as the thermal binder. When dealing with hot melt extrusion, the temperature must be higher than the melting point, and the drug or polymer must be kept stable throughout the thermal process.

The Problem

In this case, the client's polymer API mixture was melting in the feeding zone and blocking it. This blockage was forcing production to stop every 30 minutes to clear the feeding zone.

The Solution

We resolved the blockage issue by lowering the temperature in the feed zone. We also installed more vents to allow water in the API mixture to evaporate. From that point forward, the extrusion went smoothly without any additional issues – leading to an increased extrusion rate.

Extrudate milling

The Goal

The goal was to produce a uniform mixture, The client had specified that the extrudate should be milled in a single pass to improve the uniformity. Typically, the more uniform the mixture, the higher the quality - and the higher the bioavailability and solubility in humans.

We found that when the extrudate was milled one time per the client’s specifications, it resulted in inconsistent particle size and distribution. Milling had to be repeated to obtain a homogenous blend, which wasted valuable time in our tight timeframe.

The Solution

We solved this problem by reducing the feed rate for the milling. This simple adjustment allowed us to produce a powder with the properties the client sought, in a single milling step.


Finally, the last hurdle we overcame appeared during the compression phase. Common challenges with compression include poor powder properties, difficulty compressing the powder into a stable tablet, poor flow in the hopper, lack of lubrication, and cracking and sticking. For this trial batch, cracks on the tablets appeared after they were compressed.


Resolving this problem required two critical adjustments. First, we increased the dwell time during compression by slowing the compression speed. Second, we increased the pre-compression force to better remove dissolved gases from the tablets - thus reducing the main compression force. The result: no more cracked tablets.

Production Completed

On Target & On Time.

We completed the initial process development in roughly four weeks. We followed the initial process development with GMP manufacturing of the trial batches. Production of trial batches was completed in less than six weeks.

This project – with rapid turnarounds, sizeable scale-up, and challenging production issues – brought together expertise in a number of fields, from technology transfer, regulatory and chemistry, to process design and engineering. We helped our client quickly manufacture trial batches in the necessary quantities while taking future bulk production needs into account to ensure a smooth path towards commercialization.


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