There is a national shortage of Vitamin K, an antidote for poisoning by anticoagulant drugs.
Blood thinners Coumadin, or the generic Warfarin, are taken to prevent blood clots.
Levels have to be carefully monitored because severe bleeding can be a complication.
If complications do arise, Vitamin K is the best treatment.
The injectable form of Vitamin K causes blood to clot and is used for patients with serious bleeds.
A manufacturing delay is blamed for the shortage.