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API Supplier Change or Addition of Alterate API Supplier in Generic Drug Products: Cost, Quality and Regulatory Factors

Useni Reddy Mallu, Arunkanth Krishnakumar Nair, Hanimi Reddy Bapatu, Pavan Kumar M, Santosh Narla, Jonna Sankar, Tejas, Narendra Kumar Thamma and NVVSS Raman

Generic drug product (GDP) competition for market existence and profitability has become a challenging task for the manufacturers. All the generic players are putting intensive efforts to enter the market with competitive price and consistent drug product (DP) quality. The generic firms have to manage the delicate balance between the cost and quality of raw materials, especially the active pharmaceutical Ingredient (API) for market survival. Major Pharma companies have adopted the merger and acquisition strategies with API manufacturers to withstand the competition and price erosion. Still the majority firms don’t have their own API manufacturing facility. Since the finished product cost is majorily driven by API, the supplier selection plays prominent role in the generic profitability as well as quality. The supplier screening and selection includes extensive evaluation and comparison of documents, quality and cost. As part of risk mitigation strategy many generic manufactures prefer to include additional or alternate sources for API supplier. This exercise could be triggered anytime during the DP life cycle. The authors have tried to share the view on supplier change process at various stages of product lifecycle and related regulatory authority requirements and expectations. Generic products have been targeted majorly for US and Europe regions and same is being focused here. These two regulatory bodies have almost similar requirement for supplier selection and change, except difference in procedural approaches. The regulatory requirements may vary for each phase of generic product life cycle. At the development stage, the supplier change may not significantly fall into regulatory umbrella. Generally development phase comes under relatively less regulatory scruitiny than CTD submission or post approval phase. The dossier review and post approval phase have almost similar regulatory requirements. All the post approval changes shall be routed through SUPAC filing in US and VARIATION filing procedures in Europe.