The first part of this article introduced the basic features of Raman spectroscopy and presented some examples of its application in the pharmaceutical industry. This second part focusses on the technique's application as a PAT tool within the pharmaceutical manufacturing environment. FDA's PAT initiative has provided motivation to explore the application of 'new' analytical technologies to the pharmaceutical manufacturing process and Raman spectroscopy shows great promise. The strengths and weaknesses of the technique as a potential PAT tool are discussed together with some examples of how this works in practice in a pharmaceutical manufacturing environment.

Detection and identification of different polymorphic forms is, therefore, important throughout the drug development and manufacturing process.