The nurse notes that the patient is scratching and has hives 2 hours after receiving a dose of antibiotic medication. The patient soon starts having difficulty breathing and his blood pressure drops. What is the correct analysis of the patient's condition?

The patient is experiencing a moderate allergic reaction and should improve shortly.

These symptoms are probably due to food poisoning because very few patients have true allergic responses.

The patient is having a mild reaction that can be treated easily with an antihistamine.

The patient is having an anaphylactic reaction and emergency interventions should be started.