Pharmacology is a heavy component of the Planning and Implementation domains on your certification exam. You must know how to select the right medication, adjust doses for specific populations, and identify absolute contraindications. Review these core prescribing concepts before tackling the items below.
Question 1
A 55-year-old female with type 2 diabetes is currently taking maximum tolerated doses of metformin and dulaglutide. Her A1C remains 9.2% and fasting glucose averages 180 mg/dL. She weighs 80 kg. The NP decides to initiate basal insulin. Which prescription is most appropriate?
- A) Start 20 units of glargine at bedtime daily.
- B) Start 10 units of glargine at bedtime daily.✓
- C) Start 16 units of NPH before breakfast daily.
- D) Start 24 units of detemir before breakfast daily.
💡 Key Takeaway
The standard starting dose for basal insulin is 10 units daily or 0.1 to 0.2 units/kg/day.
Show rationale
The recommended starting dose for basal insulin in type 2 diabetes is typically 10 units per day or weight-based at 0.1 to 0.2 units/kg/day. For an 80 kg patient, the weight-based calculation yields 8 to 16 units. Option B is correct as 10 units is a safe, guideline-concordant starting dose that minimizes hypoglycemia risk. Option A is incorrect because 20 units exceeds the recommended starting threshold and risks nocturnal hypoglycemia. Option C is incorrect because NPH carries a higher risk of hypoglycemia compared to long-acting analogs, and 16 units is at the absolute upper limit of the starting range. Option D is incorrect because 24 units significantly overshoots the recommended starting calculation for her weight.
Question 2
A 55-year-old male has an ASCVD risk score of 8.5% but is reluctant to start statin therapy due to concerns about side effects. He asks if there is a way to know if he truly needs the medication. Which action is most appropriate?
- A) Reassure him that statins are entirely optional.
- B) Obtain a coronary artery calcium scoring scan.✓
- C) Prescribe a low-intensity statin to ensure adherence.
- D) Recommend an exercise treadmill stress test today.
💡 Key Takeaway
Coronary artery calcium scoring helps clarify the need for statins in intermediate-risk patients reluctant to start therapy.
Show rationale
When a patient falls into the intermediate risk category with an ASCVD risk score of 8.5% and is reluctant to start statin therapy, obtaining a coronary artery calcium scoring scan is highly useful. This imaging helps reclassify risk and effectively guides shared decision-making. Reassuring him that statins are entirely optional dismisses his elevated risk and misses a crucial opportunity for proper risk stratification. Prescribing a low-intensity statin to ensure adherence is incorrect because intermediate risk warrants moderate-intensity therapy if a medication is initiated. Recommending an exercise treadmill stress test today is inappropriate because it evaluates for obstructive coronary disease in symptomatic patients, whereas this patient requires asymptomatic screening and risk assessment.
Question 3
A 35-year-old female with severe rheumatoid arthritis reports a missed period by two weeks and a positive home pregnancy test. She currently takes methotrexate 15 mg weekly to control her joint inflammation. What is the most appropriate action?
- A) Discontinue the methotrexate and refer to rheumatology.✓
- B) Continue the methotrexate and refer to rheumatology.
- C) Decrease the methotrexate and refer to rheumatology.
- D) Substitute the methotrexate with oral leflunomide therapy.
💡 Key Takeaway
Methotrexate is a potent teratogen and abortifacient that must be stopped immediately upon pregnancy.
Show rationale
Methotrexate is a folic acid antagonist that is highly teratogenic and can act as an abortifacient. It must be stopped immediately upon pregnancy confirmation, followed by urgent specialist coordination to manage her arthritis safely. Continuing or decreasing the dose exposes the fetus to severe skeletal and central nervous system anomalies. Leflunomide is also strictly contraindicated in pregnancy due to severe teratogenicity, making it an inappropriate substitute. The safest immediate action is complete cessation.
Question 4
A 68-year-old patient with severe peripheral atherosclerosis was started on enalapril 5 mg daily for hypertension. One week later, routine laboratory testing reveals the creatinine increased from 1.1 to 1.8 mg/dL. Which action is most appropriate?
- A) Maintain the current dosage and recheck the labs in two weeks.
- B) Add a daily loop diuretic to improve the renal perfusion.
- C) Reduce the enalapril dose and advise a low potassium diet.
- D) Discontinue the medication and evaluate for bilateral renal artery stenosis.✓
💡 Key Takeaway
A creatinine rise greater than 30 percent on an ACE inhibitor warrants discontinuation and evaluation for renal artery stenosis.
Show rationale
A rapid rise in serum creatinine exceeding 30 percent after starting an ACE inhibitor strongly suggests bilateral renal artery stenosis, especially in a patient with diffuse atherosclerosis. The creatinine jumped from 1.1 to 1.8, an increase of over 60 percent, which requires immediate cessation of the offending agent. Option A is dangerous because continuing the drug can lead to acute renal failure. Option B is inappropriate as diuresis could further deplete intravascular volume and worsen the acute kidney injury. Option C is incorrect because a dose reduction is insufficient when an acute ischemic nephropathy is suspected. The drug must be stopped completely to preserve kidney function.
Question 5
Many African American patients who are prescribed monotherapy for essential hypertension experience a reduced blood pressure lowering response to angiotensin receptor blockers. Which physiological mechanism primarily explains this specific clinical phenomenon?
- A) Increased baseline sympathetic nervous system tone
- B) Decreased baseline circulating plasma renin levels✓
- C) Accelerated hepatic metabolism of the medication
- D) Reduced gastrointestinal absorption of the medication
💡 Key Takeaway
African American patients often have low-renin hypertension, making RAAS-targeting medications less effective as monotherapy.
Show rationale
African American patients frequently exhibit a low-renin hypertension profile, which makes medications targeting the renin-angiotensin-aldosterone system, such as ACE inhibitors and ARBs, less effective when used as monotherapy. Decreased plasma renin explains why calcium channel blockers or thiazide diuretics, which work independently of the RAAS system, are preferred initially. Increased sympathetic tone, accelerated hepatic metabolism, and reduced gastrointestinal absorption do not account for this specific racial disparity in antihypertensive efficacy.
Question 6
A 60-year-old male with primary hypothyroidism switched from brand-name to generic levothyroxine at his pharmacy exactly six weeks ago due to insurance changes. He is taking the exact same microgram dose and reports no new symptoms. Which action is most appropriate?
- A) Order a serum TSH level to evaluate therapeutic equivalence.✓
- B) Order a free T4 level to evaluate therapeutic equivalence.
- C) Maintain current monitoring as the formulations are completely identical.
- D) Increase the generic dose to match brand-name bioavailability levels.
💡 Key Takeaway
Switching between brand and generic levothyroxine requires re-evaluating the TSH in six weeks due to narrow therapeutic indices.
Show rationale
Levothyroxine has a narrow therapeutic index, meaning small differences in bioavailability between brand-name and generic formulations can cause significant clinical changes. When a patient switches formulations, a TSH evaluation is required in six weeks to ensure therapeutic equivalence. Free T4 is less sensitive than TSH for this purpose. Assuming identical bioavailability is unsafe due to variations in excipients. Empirically increasing the dose is inappropriate without first confirming the TSH level.
Question 7
A 38-year-old patient is prescribed tramadol for acute back pain. The patient reports drinking three glasses of wine nightly to help manage severe work-related insomnia.
- A) Advise taking the medication in the morning to avoid nighttime interactions.
- B) Recommend reducing alcohol intake to one glass of wine each night.
- C) Instruct the patient to abstain entirely from alcohol while taking tramadol.✓
- D) Suggest taking an over-the-counter antihistamine instead of drinking wine nightly.
💡 Key Takeaway
Complete abstinence from alcohol is required during opioid therapy due to the risk of profound CNS depression.
Show rationale
Combining tramadol with alcohol creates a severe risk for profound central nervous system depression, respiratory failure, and death. The FNP must instruct the patient to abstain from alcohol entirely during opioid therapy. Option A is incorrect because tramadol's half-life means the drug will still interact with evening alcohol consumption. Option B is unsafe; there is no safe threshold for mixing alcohol and opioids, especially given the patient's baseline intake of three glasses of wine. Option D is dangerous; substituting alcohol with an antihistamine introduces another central nervous system depressant, which also heavily exacerbates the risk of fatal respiratory depression.
Question 8
A 72-year-old female with HFrEF brings her food log to the clinic. She eats canned soup daily, noting the label says 400 mg of sodium. She still experiences exertional dyspnea and trace pedal edema. Which intervention is best?
- A) Instruct her to eliminate all canned foods from her daily diet.
- B) Ask her to verify the number of servings per soup can.✓
- C) Advise her to restrict her daily fluid intake to two liters.
- D) Tell her to switch to a low-sodium canned vegetable broth brand.
💡 Key Takeaway
Accurate interpretation of serving sizes on nutrition labels is essential for effective sodium restriction.
Show rationale
Patients often misinterpret nutrition labels by looking at sodium per serving rather than total sodium per container. Verifying the servings per container is the most targeted assessment for her hidden sodium intake. Option A is unnecessarily restrictive and unrealistic for long-term adherence. Option C incorrectly jumps to fluid restriction before fully optimizing and assessing her dietary sodium compliance, which is the primary driver of her symptoms. Option D assumes the current soup is the only issue without identifying the underlying knowledge deficit regarding accurate label reading.
Question 9
A 24-year-old female presents for a follow-up visit regarding her irregular menstrual cycles. She has a body mass index of 28.4 and was recently diagnosed with polycystic ovary syndrome. She currently takes no medications. Which action should the nurse practitioner prioritize?
- A) Postpone diabetes screening until she reaches age thirty-five.
- B) Initiate metformin therapy before obtaining baseline glucose labs.
- C) Perform a comprehensive metabolic panel or hemoglobin A1c.✓
- D) Monitor for polyuria and polydipsia before ordering tests.
💡 Key Takeaway
Overweight adults of any age with PCOS require immediate screening for type 2 diabetes.
Show rationale
Adults of any age with overweight or obesity and at least one additional risk factor require diabetes screening. Polycystic ovary syndrome is a clinical condition associated with severe insulin resistance. Therefore, this young patient requires immediate screening with a hemoglobin A1c or fasting glucose. Postponing until age 35 applies only to patients without additional risk factors. Initiating metformin without baseline laboratory confirmation is outside standard protocols and unsafe. Waiting for classic symptoms like polyuria ignores the purpose of asymptomatic screening and delays necessary intervention.
Question 10
A 79-year-old patient is recovering from a Stage 3 sacral ulcer. Despite adequate protein intake and proper offloading for four weeks, the nurse practitioner notes stalled wound contraction and pale granulation tissue. Which dietary modification should be prescribed next?
- A) Supplement the diet with oral vitamin E and copper.
- B) Supplement the diet with oral vitamin C and zinc.✓
- C) Supplement the diet with oral vitamin A and iron.
- D) Supplement the diet with oral vitamin D and calcium.
💡 Key Takeaway
Vitamin C and zinc are critical micronutrients for collagen synthesis and epithelialization in stalled pressure injuries.
Show rationale
When a pressure injury shows stalled wound contraction despite optimized macronutrients and offloading, micronutrient deficiencies must be addressed. Option B is correct because vitamin C and zinc play essential roles in all phases of wound healing. Vitamin C is required for the hydroxylation of proline and lysine during collagen synthesis, while zinc is a crucial cofactor for RNA and DNA polymerase, driving cellular proliferation and epithelialization. Option A is incorrect; while copper plays a minor role in cross-linking collagen, high-dose vitamin E can actually inhibit collagen synthesis and delay healing. Option C is incorrect because, although vitamin A is useful for counteracting the delayed healing effects of corticosteroids, it is not the primary supplement for general stalled healing. Option D is incorrect as vitamin D and calcium primarily support bone health rather than soft tissue repair.
Question 11
A 72-year-old female on a prednisone taper for polymyalgia rheumatica is currently taking prednisone 7.5 mg daily. She reports two weeks of recurrent shoulder stiffness lasting 2 hours, and her current ESR and CRP are elevated. Which action is most appropriate?
- A) Increase prednisone to the last effective daily dose.✓
- B) Maintain current dose and add a daily ibuprofen.
- C) Refer to rheumatology to initiate early methotrexate therapy.
- D) Order bilateral shoulder radiographs to assess the joints.
💡 Key Takeaway
PMR relapses with elevated inflammatory markers require increasing prednisone to the last effective dose before resuming tapering.
Show rationale
When a patient exhibits recurrent PMR symptoms alongside elevated inflammatory markers, it indicates a true disease relapse rather than simple steroid withdrawal. The standard of care is to increase the prednisone back to the last effective daily dose that controlled the symptoms, then resume a slower taper. Adding ibuprofen is incorrect because NSAIDs do not effectively control the systemic inflammation of a PMR relapse. Referring to rheumatology for methotrexate is premature; steroid-sparing agents are typically reserved for patients who experience multiple relapses or cannot taper below a high dose. Ordering shoulder radiographs is unnecessary because PMR is a clinical diagnosis characterized by periarticular inflammation, which does not present as erosive joint damage on standard x-rays.
Question 12
A 68-year-old patient with newly diagnosed HFrEF requires initiation of beta-blocker therapy. Which medication choice is most appropriate for this specific diagnosis?
- A) Prescribe carvedilol because it has proven mortality benefits in HFrEF.✓
- B) Prescribe atenolol because it is cardioselective and highly well tolerated.
- C) Prescribe metoprolol tartrate because it provides rapid symptom relief safely.
- D) Prescribe propranolol because it offers comprehensive nonselective beta blockade therapy.
💡 Key Takeaway
Only carvedilol, metoprolol succinate, and bisoprolol are evidence-based beta-blockers proven to reduce mortality in HFrEF.
Show rationale
Not all beta-blockers are created equal when treating heart failure with reduced ejection fraction. Only three beta-blockers—carvedilol, metoprolol succinate, and bisoprolol—have been definitively shown in large clinical trials to reduce mortality and hospitalizations in this population. Option A is correct because carvedilol is one of the specific, evidence-based beta-blockers recommended by current guidelines. Option B is incorrect because atenolol has not demonstrated mortality benefits in heart failure. Option C is incorrect because metoprolol tartrate is short-acting and does not carry the same heart failure mortality benefits as the extended-release succinate formulation. Option D is incorrect because propranolol is a nonselective beta-blocker that is not indicated or proven effective for the management of heart failure.
