Which statement best describes IVIVC in formulation development?

Which statement best describes IVIVC in formulation development?

• A. It provides a predictive link between dissolution and in vivo exposure to support regulatory submissions.
• B. It replaces all need for in vivo bioavailability testing.
• C. It denies any regulatory use.
• D. It measures dissolution in vitro only.

Answer: (B)

IVIVC is about building a predictive link between how a formulation dissolves in vitro and how the drug behaves in vivo. When this correlation is valid, dissolution tests can forecast real human exposure (like PK parameters), which can inform formulation development and support regulatory submissions. It can also enable regulatory waivers for certain in vivo studies under appropriate conditions, helping to streamline development. However, it does not replace all in vivo bioavailability testing—initial approvals still rely on in vivo data, and IVIVC is used to reduce or tailor further testing rather than eliminate it entirely. It also goes beyond simply measuring dissolution in vitro; it relies on linking those dissolution results to in vivo outcomes to make meaningful predictions.

IVIVC is about building a predictive link between how a formulation dissolves in vitro and how the drug behaves in vivo. When this correlation is valid, dissolution tests can forecast real human exposure (like PK parameters), which can inform formulation development and support regulatory submissions. It can also enable regulatory waivers for certain in vivo studies under appropriate conditions, helping to streamline development. However, it does not replace all in vivo bioavailability testing—initial approvals still rely on in vivo data, and IVIVC is used to reduce or tailor further testing rather than eliminate it entirely. It also goes beyond simply measuring dissolution in vitro; it relies on linking those dissolution results to in vivo outcomes to make meaningful predictions.