EMS Pharmacology & Drug Administration 2

Question 1

Which drug class does adenosine belong to, and what is its primary EMS use?

Accepted Answer

Antiarrhythmic used to convert supraventricular tachycardia (SVT)

Answer

Adenosine is an endogenous antiarrhythmic that temporarily blocks AV node conduction to terminate SVT.

Question 2

A patient is experiencing an anaphylactic reaction. The standard adult dose of epinephrine 1:1,000 given IM is:

Accepted Answer

0.3 mg

Answer

The standard adult IM dose for anaphylaxis is 0.3 mg of epinephrine 1:1,000 into the anterolateral thigh.

Question 3

What is the mechanism of action of naloxone (Narcan)?

Accepted Answer

It competitively blocks opioid receptors

Answer

Naloxone works by competitively binding and blocking opioid receptors, reversing opioid-induced CNS and respiratory depression.

Question 4

When administering nitroglycerin sublingually, which vital sign must be checked BEFORE each dose?

Accepted Answer

Blood pressure

Answer

Blood pressure must be checked before each nitroglycerin dose because it causes vasodilation and can precipitate dangerous hypotension.

Question 5

A 70 kg patient needs a dopamine infusion at 5 mcg/kg/min. The bag contains 400 mg in 250 mL. What is the drip rate in mL/hr?

Accepted Answer

13.1 mL/hr

Answer

Dose = 5 mcg/kg/min × 70 kg = 350 mcg/min; concentration = 400,000 mcg/250 mL = 1,600 mcg/mL; rate = 350/1,600 × 60 min = 13.1 mL/hr.

(EMS) Emergency Medical Services Certified Practice Test