ATI RN
ATI Proctored Pharmacology 2023 Quizlet Questions
Question 1 of 5
A 25-year-old male comes to the emergency department with crushing, substernal chest pain. The pain radiates up to his jaw and down to his right arm. He has never had chest pain like this before. An ECG shows ST elevations in leads I, II, and AVF. A detailed history reveals that he had used cocaine 2 h prior to the onset of chest pain. Which of the following medications is contraindicated in the treatment of myocardial infarction caused by his cocaine use?
Correct Answer: C
Rationale: Cocaine-induced MI (ST elevations) contraindicates β-blockers . They exacerbate coronary vasospasm via unopposed α-stimulation. ACE inhibitors , aspirin , calcium channel blockers , and nitroglycerin (E) are safe. β-Blockers worsen this unique MI etiology.
Question 2 of 5
The classification of digoxin is:
Correct Answer: D
Rationale: Digoxin belongs to the class of medications known as cardiac glycosides. Cardiac glycosides, such as digoxin, are commonly used in the treatment of heart failure and certain types of irregular heartbeats (arrhythmias). They work by affecting the heart muscle and helping to improve the heart's ability to pump blood effectively. Digoxin is particularly effective in controlling heart rate and symptoms in patients with congestive heart failure and atrial fibrillation. It is important to monitor digoxin levels carefully due to its narrow therapeutic index and potential for toxicity.
Question 3 of 5
A 25-year-old woman suffers a bee sting and within a few minutes she notices a blotchy rash appearing on her body. She is taken to A&E where her BP is 90/60 mmHg. The most appropriate immediate therapy would be:
Correct Answer: D
Rationale: Anaphylaxis (rash, hypotension) post-bee sting needs urgent reversal. Oral antihistamine is too slow for systemic shock. IV adrenaline (1:10000) suits cardiac arrest, not initial anaphylaxis. IV hydrocortisone acts slowly, supporting later. IM adrenaline (0.5 mL 1:1000, 0.5 mg) rapidly reverses bronchospasm and hypotension via alpha/beta agonism, the immediate therapy per guidelines. Salbutamol targets asthma, not shock. IM adrenaline's speed saves lives in anaphylaxis.
Question 4 of 5
The nurse is preparing to give a potassium supplement. Which laboratory test should be checked before the patient receives a dose of potassium?
Correct Answer: B
Rationale: Before administering potassium supplements to a patient, it is essential to check the patient's serum potassium level. This allows the healthcare provider to assess the current potassium level in the body and determine if supplementation is necessary. Monitoring serum potassium levels is crucial because both low potassium (hypokalemia) and high potassium (hyperkalemia) levels can have serious health implications. Administering potassium supplements without checking the serum potassium level could lead to adverse effects or complications, so it is important to confirm the need for supplementation based on this laboratory test.
Question 5 of 5
A 22-year-old female accounting student requires a daily cup of coffee upon arising and another cup as she finishes her first class of the day. She prefers to drink caffeinated products. Which of the following is the most plausible mechanism of action of this product?
Correct Answer: A
Rationale: Caffeine's stimulant effect in coffee relies on adenosine receptor blockade . By inhibiting adenosine's sedative action, caffeine increases alertness, fitting her routine. Option , decreasing cAMP, contradicts caffeine's phosphodiesterase inhibition, which raises cAMP. Option , decreasing cGMP, is unrelated. Option , stimulating phosphodiesterase, opposes caffeine's action. Option (E), calcium transport, isn't primary. Adenosine antagonism drives caffeine's wakefulness, supporting her daily use to combat fatigue during study.