Analytical methods for determination of Lopinovir and Ritinovir

The present state-of-theart is replicated through the data based on the edition of European (The European Pharmacopoeia and Council of Europe, 2002)[1] and US (United States Pharmacopoeia, 2004)[2] pharm acopoeias. From the stages of drug development to marketing and post marketing, analytical techniques play a great role, be it understanding the physical and chemical stability of the drug, impact on the selection and design of the dosage form, assessing the stability of the drug molecules, quantitation of the impurities and identification of those impurities which are above the established threshold essential to evaluate the toxicity profiles of these impurities to distinguish these from that of the API, when applicable and assessing the content of drug in the marketed products.