Phenindione is an anticoagulant which functions as a Vitamin K antagonist.

Phenindione was introduced in the early 1950s.

It acts similar to warfarin, but it has been associated with hypersensitivity reactions, so it is rarely used and warfarin is preferred.

[1][2] This drug article relating to the blood and blood forming organs is a stub.

You can help Wikipedia by expanding it.