Question

a client is experiencing a severe anaphylactic reaction to an injection of contrast media. which pharmacologic agent is of greatest use in this situation?

a epinephrine.

b nitroprusside.

c loratadine.

d dopamine.

Explanation:

Anaphylactic reactions are severe allergic responses. Epinephrine (adrenaline) is the first - line drug for treating anaphylaxis as it counteracts the effects of histamine release, relieves bronchospasm, increases blood pressure, and reduces swelling. Nitroprusside is used for hypertensive emergencies, loratadine is an anti - histamine used for mild allergic reactions (not severe anaphylaxis), and dopamine is used for conditions like shock to improve blood flow but not as the first - line for anaphylaxis.

Answer:

A. Epinephrine