Scale-Up Blog Series, Part 3[Editor's note: Scale-up is an inevitable part of the product life cycle of every successful drug, and each time it is required, a meticulous process must be followed to ensure that the end result is identical to the product formulation as originally devised. This is part 3 of an in-depth, multi-part series on product scale-up. Visit our blog page to read parts 1 and 2.]