BCS and Biopharmaceutics Drug disposition Classification System are free, not contending, grouping frame works that intend to increase, rearrange, and grow drug advancement. Albeit the two frameworks depend on characterizing drugs and new sub-atomic elements into four classes utilizing a similar solubility rules, they contrast in the basis for penetrability and have various purposes. Here, the subtleties and utilizations of the two frameworks are checked on with specific accentuation of their job in drug improvement.