Final answer:
The action by the client that warrants immediate intervention by the nurse is taking vitamin E OTC medication, as it can increase the risk of bleeding in patients with DVT.
Step-by-step explanation:
The action by the client that warrants immediate intervention by the nurse is option C: The client takes vitamin E OTC medication.
Patients with deep vein thrombosis (DVT) should avoid taking over-the-counter (OTC) medications that can thin the blood and increase the risk of bleeding, such as vitamin E.
Option A: The client taking a stool softener every day at dinnertime is not a cause for immediate intervention by the nurse as it is a common practice to prevent constipation, which can be a side effect of some medications.
Option B: The client wearing a Medic Alert bracelet is important for emergency medical personnel to be aware of the client's medical conditions and any allergies or special needs they may have.
Option D: The client purchasing a new recliner that will elevate the legs is actually a positive action as elevating the legs can help improve blood flow and reduce the risk of DVT.