Final answer:
The nurse should suspect that antihistamines and slow-acting corticosteroids may be contributing to the client's epistaxis.
Step-by-step explanation:
Epistaxis, or nosebleed, can be caused by various factors, including certain medications. In the case of a client reporting epistaxis in the emergency department, the nurse should suspect that the medications contributing to the nosebleed are antihistamines and slow-acting corticosteroids.
Antihistamines are commonly used to relieve allergy symptoms, including nasal congestion and inflammation. However, they can sometimes cause dryness and irritation of the nasal passages, leading to nosebleeds.
Slow-acting corticosteroids, on the other hand, are used to reduce inflammation in the body, including allergic reactions. While they are generally safe, they can cause thinning of the blood vessels, making them more prone to bleeding.