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SBFC Farmácia Clínica study materials
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SBFC Farmácia Clínica practice questions

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Question 1Pharmaceutical Care and Clinical Pharmacy Practice

Which document is the primary legal basis for the practice of clinical pharmacy and pharmaceutical care in Brazil?

  1. Resolução ANVISA RDC nº 44/2009, on good dispensing practices
  2. Lei nº 13.021/2014, which regulates pharmaceutical activity Correct answer.
  3. Lei nº 8.080/1990, which organizes the public health system
  4. Decreto nº 85.878/1981, on the pharmacist's traditional duties

Explanation

Lei nº 13.021/2014 establishes that pharmaceutical activity is a health action, with the pharmacist responsible for pharmaceutical care and for promoting rational drug use. It redefined the profession beyond merely selling medicines.

Question 2Pharmaceutical Care and Clinical Pharmacy Practice

In the pharmaceutical care model, what is the central objective of the pharmacist's follow-up of a patient?

  1. Reducing the total number of medicines dispensed to cut costs
  2. Recording dispensing data for administrative reporting
  3. Identifying and resolving drug therapy problems to improve health outcomes Correct answer.
  4. Verifying that prescriptions follow the local formulary

Explanation

Pharmaceutical care is oriented toward the patient and aims to identify, prevent and resolve drug therapy problems so that pharmacotherapy achieves its goals safely and effectively. The pharmacist shares responsibility for outcomes with the patient and other professionals.

Question 3Pharmaceutical Care and Clinical Pharmacy Practice

A patient brings a prescription for warfarin and reports starting a new course of oral fluconazole. Which drug therapy problem is most relevant for the pharmacist to address?

  1. Non-adherence because the prescription is illegible
  2. Need for an additional medicine to protect the stomach
  3. Duplication of anticoagulant therapy
  4. Potential drug interaction increasing bleeding risk Correct answer.

Explanation

Fluconazole inhibits CYP2C9, which metabolizes warfarin, so the anticoagulant effect can increase and raise bleeding risk. The pharmacist should flag this interaction and recommend monitoring of the INR and dose adjustment.

Question 4Pharmaceutical Care and Clinical Pharmacy Practice

Which classification of drug therapy problems corresponds to a patient who needs a medicine but is not receiving one?

  1. Adverse drug reaction
  2. Unnecessary drug therapy
  3. Ineffective drug therapy
  4. Need for additional drug therapy Correct answer.

Explanation

The need for additional therapy applies when a condition requires a medicine that the patient is not currently taking. The other categories refer to unnecessary therapy, therapy that is not effective, or harm from a medicine already used.

Question 5Pharmaceutical Care and Clinical Pharmacy Practice

Which parameter is the best laboratory marker for monitoring the effectiveness of anticoagulation with warfarin?

  1. Fibrinogen concentration
  2. INR Correct answer.
  3. Platelet count
  4. Activated partial thromboplastin time

Explanation

Warfarin is monitored with the INR, which reflects the extrinsic pathway and the effect of vitamin K antagonism. Dosing is adjusted to keep the INR within the target range appropriate for the clinical indication.

Question 6Pharmaceutical Care and Clinical Pharmacy Practice

A patient with asthma uses a salbutamol inhaler more than four times a day and wakes at night with symptoms twice a week. What does this pattern most suggest?

  1. A need to double the rescue inhaler dose permanently
  2. An expected effect of inhaled corticosteroids
  3. Correct use of rescue therapy as prescribed
  4. Inadequate asthma control requiring treatment review Correct answer.

Explanation

Frequent rescue inhaler use and nocturnal symptoms indicate poor asthma control and warrant reassessment of controller therapy. The pharmacist should refer the patient for clinical review rather than simply reinforcing rescue use.

Question 7Pharmaceutical Care and Clinical Pharmacy Practice

Which action best describes medication reconciliation at hospital admission?

  1. Scheduling follow-up appointments after discharge
  2. Counting the tablets remaining in each home package
  3. Comparing the patient's pre-admission medicines with new orders to detect discrepancies Correct answer.
  4. Replacing all home medicines with hospital formulary equivalents

Explanation

Medication reconciliation is a structured comparison of the medicines the patient was actually taking with newly prescribed orders, aiming to prevent omissions, duplications and dosing errors. It is performed at transitions of care.

Question 8Pharmaceutical Care and Clinical Pharmacy Practice

Which communication technique is most appropriate when counseling a patient with low health literacy about a new medicine?

  1. Speaking quickly so the patient does not forget the first points
  2. Giving a long printed leaflet and asking the patient to read it at home
  3. Teach-back, asking the patient to explain how the medicine will be used Correct answer.
  4. Using technical terms to ensure the explanation is precise

Explanation

Teach-back confirms understanding by having the patient restate the plan in their own words, revealing gaps that can be corrected immediately. Plain language and a focus on essential messages improve comprehension.

Question 9Pharmaceutical Care and Clinical Pharmacy Practice

Which element is essential for documenting pharmaceutical care in the patient record?

  1. The commercial brand of every medicine dispensed
  2. The identified drug therapy problem, the intervention, and the follow-up plan Correct answer.
  3. Only the name of the pharmacist who performed the service
  4. The patient's insurance billing code

Explanation

Clinical documentation must record the problem identified, the intervention made and the plan for monitoring, allowing continuity and evaluation of outcomes. This structure supports communication with the care team.

Question 10Pharmaceutical Care and Clinical Pharmacy Practice

A patient on lithium presents with tremor, vomiting and confusion. Which monitoring parameter should the pharmacist prioritize?

  1. Serum amylase
  2. Urine culture
  3. Serum lithium concentration Correct answer.
  4. Total cholesterol

Explanation

These signs suggest lithium toxicity, and the serum concentration correlates with severity and guides management. The pharmacist should also assess hydration, renal function and interacting drugs such as diuretics and NSAIDs.

Question 11Pharmaceutical Care and Clinical Pharmacy Practice

Which statement best describes the pharmacist's role in antimicrobial stewardship programs?

  1. Promoting appropriate selection, dose and duration of antimicrobials Correct answer.
  2. Limiting microbiology laboratory testing
  3. Replacing prescribers in deciding empirical therapy
  4. Authorizing the purchase of restricted antibiotics

Explanation

In stewardship, pharmacists support correct indication, dosing, de-escalation and duration, and they monitor for toxicity and interactions. The goal is optimal therapy, not restriction of access or substitution of prescriber judgment.

Question 12Pharmaceutical Care and Clinical Pharmacy Practice

A 70-year-old patient with reduced renal function is prescribed a renally eliminated drug at the standard adult dose. What is the pharmacist's most appropriate intervention?

  1. Recommend no change because age does not affect dosing
  2. Recommend adding a second drug of the same class
  3. Recommend doubling the dose to ensure efficacy
  4. Recommend dose adjustment based on estimated renal function Correct answer.

Explanation

Drugs eliminated by the kidney accumulate when renal function declines, increasing toxicity risk, so the dose or interval must be adjusted according to estimated clearance. The pharmacist should calculate renal function and propose a specific regimen.

Question 13Pharmaceutical Care and Clinical Pharmacy Practice

Which question best reflects the pharmacist's assessment of medication adherence during an interview?

  1. Assuming adherence because the prescription was filled
  2. Reviewing the pharmacy stock records
  3. Checking only whether the patient knows the dose
  4. Asking open-ended questions about how the patient actually takes each medicine Correct answer.

Explanation

Open-ended, non-judgmental questions elicit the patient's real routine and reveal missed doses, barriers and beliefs. Assuming adherence from dispensing data or dose knowledge alone misses important causes of failure.

Question 14Pharmaceutical Care and Clinical Pharmacy Practice

Which adverse effect should the pharmacist counsel a patient starting an ACE inhibitor to watch for?

  1. Hyperkalemia-related muscle weakness
  2. Persistent dry cough Correct answer.
  3. Photosensitivity rash
  4. Bradycardia

Explanation

A dry cough is a characteristic adverse effect of ACE inhibitors, caused by bradykinin accumulation, and may require switching to an angiotensin receptor blocker. Patients should also be monitored for hyperkalemia and renal function changes.

Question 15Pharmaceutical Care and Clinical Pharmacy Practice

A prescription contains two medicines with the same pharmacological action for the same indication. Which drug therapy problem should the pharmacist document?

  1. Need for additional drug therapy
  2. Unnecessary drug therapy due to therapeutic duplication Correct answer.
  3. Adverse drug reaction
  4. Ineffective drug therapy

Explanation

Therapeutic duplication means the patient is receiving more than one medicine with the same effect for the same purpose, adding risk without benefit. The pharmacist should clarify with the prescriber and recommend simplification.

Question 16Pharmaceutical Care and Clinical Pharmacy Practice

Which activity is part of the pharmacist's role in health education within primary care?

  1. Providing guidance on correct use of medicines to groups and individuals Correct answer.
  2. Diagnosing chronic diseases independently
  3. Performing surgery in minor procedures
  4. Deciding hospital admission criteria

Explanation

Health education by pharmacists includes counseling individuals and groups on correct medicine use, storage, adherence and self-care, within the scope of pharmaceutical practice. Diagnosis and invasive procedures are outside this role.

Question 17Pharmaceutical Care and Clinical Pharmacy Practice

A patient with heart failure reports gaining 3 kg in one week and increasing shortness of breath. What should the pharmacist do?

  1. Refer promptly for clinical assessment of possible decompensation Correct answer.
  2. Advise stopping all heart failure medicines until review
  3. Reassure the patient that weight gain is unrelated to heart failure
  4. Recommend increasing the diuretic dose without medical contact

Explanation

Rapid weight gain and worsening dyspnea suggest fluid retention and possible heart failure decompensation, requiring prompt medical evaluation. The pharmacist identifies the warning sign and facilitates referral rather than adjusting therapy alone.

Question 18Pharmaceutical Care and Clinical Pharmacy Practice

Which practice best supports rational medicine use in a health service?

  1. Dispensing antibiotics without prescription on request
  2. Avoiding any review of prescribing patterns
  3. Encouraging prescribing by commercial promotion alone
  4. Using evidence-based guidelines and monitoring prescribing indicators Correct answer.

Explanation

Rational use requires evidence-based selection, correct dosing and duration, and periodic review of prescribing indicators to detect problems. Commercial influence and unrestricted access to antibiotics undermine this goal.

Question 19Pharmaceutical Care and Clinical Pharmacy Practice

Which counseling point is most important for a patient using a metered-dose inhaler without a spacer?

  1. Holding the inhaler far from the open mouth
  2. Inhaling as fast as possible after actuation
  3. Shaking the device only after inhalation
  4. Coordinating actuation with a slow, deep inhalation Correct answer.

Explanation

Correct technique requires shaking the device, exhaling, actuating while beginning a slow deep inhalation, then holding the breath. Poor coordination reduces lung deposition and worsens control.

Question 20Pharmaceutical Care and Clinical Pharmacy Practice

A pregnant patient asks about a medicine classified as contraindicated in pregnancy. What is the pharmacist's best action?

  1. Confirm that the medicine is safe because it is widely used
  2. Advise the patient to stop the medicine without informing anyone
  3. Increase the dose to shorten the treatment course
  4. Contact the prescriber to discuss a safer alternative Correct answer.

Explanation

When a contraindicated medicine is prescribed in pregnancy, the pharmacist should discuss risk and alternatives with the prescriber rather than acting unilaterally. The decision must balance maternal and fetal risk.

Question 21Pharmaceutical Care and Clinical Pharmacy Practice

Which outcome measure best evaluates the impact of a pharmaceutical care service?

  1. Change in clinical markers such as blood pressure or glycated hemoglobin Correct answer.
  2. Number of leaflets printed
  3. Number of prescriptions dispensed per day
  4. Total sales revenue of the pharmacy

Explanation

Clinical outcome measures such as blood pressure or glycated hemoglobin reflect whether the service improves patient health. Process counts and financial indicators describe activity but not clinical benefit.

Question 22Pharmaceutical Care and Clinical Pharmacy Practice

In a patient taking digoxin, which electrolyte disturbance most increases the risk of toxicity?

  1. Hypophosphatemia
  2. Hypokalemia Correct answer.
  3. Hypernatremia
  4. Hyperchloremia

Explanation

Low potassium enhances digoxin binding to the sodium-potassium pump and increases the risk of arrhythmias and toxicity. Potassium and renal function should be monitored, especially with diuretics.

Question 23Pharmaceutical Care and Clinical Pharmacy Practice

Which statement correctly describes a randomized controlled trial in the context of evidence-based pharmacy?

  1. It relies on expert opinion rather than data
  2. It cannot be used to evaluate medicines
  3. It always reflects real-world practice better than observational studies
  4. It compares interventions with random allocation to reduce selection bias Correct answer.

Explanation

Random allocation balances known and unknown confounders between groups, giving stronger causal inference about an intervention. Its results still require appraisal for applicability to individual patients.

Question 24Pharmaceutical Care and Clinical Pharmacy Practice

A patient reports taking an herbal product along with a prescribed medicine. What is the pharmacist's most appropriate first step?

  1. Dismiss the product because it is natural and therefore safe
  2. Recommend doubling the prescribed medicine to compensate
  3. Tell the patient to stop all prescribed medicines
  4. Assess the product for potential interactions and ask about dose and frequency Correct answer.

Explanation

Herbal products can alter drug metabolism or effects, so the pharmacist should identify the product, dose and duration and screen for interactions. The assumption that natural products are harmless is incorrect.

Question 25Pharmaceutical Care and Clinical Pharmacy Practice

Which element distinguishes pharmaceutical care from traditional dispensing?

  1. Limiting contact with other health professionals
  2. Faster processing of prescriptions
  3. Shared responsibility for the patient's health outcomes over time Correct answer.
  4. Exclusive focus on the medicine's price

Explanation

Pharmaceutical care involves an ongoing relationship in which the pharmacist assumes shared responsibility for outcomes, beyond preparing and delivering medicines. It requires follow-up and collaboration with the care team.

Question 26Pharmaceutical Care and Clinical Pharmacy Practice

Which term describes the unintentional use of a medicine at a dose or frequency higher than prescribed, often due to misunderstanding the instructions?

  1. Adverse drug reaction
  2. Medication misuse Correct answer.
  3. Medication underuse
  4. Therapeutic duplication

Explanation

Medication misuse refers to use of a medicine outside the prescribed regimen, including taking too much or at the wrong frequency because instructions were misunderstood, rather than deliberate abuse. It differs from underuse, duplication, and adverse reactions, which describe other distinct drug therapy problems.

Question 27Pharmaceutical Care and Clinical Pharmacy Practice

A pharmacist is prioritizing patients for a medication review service. Which patient characteristic most directly indicates a high need for comprehensive medication review?

  1. The patient collects prescriptions monthly
  2. The patient has a stable single chronic condition
  3. The patient requests a refill by telephone
  4. The patient uses five or more chronic medicines Correct answer.

Explanation

Polypharmacy, commonly defined as use of five or more medicines, is a recognized marker of increased risk of drug interactions, adverse effects, and non-adherence, so these patients benefit most from comprehensive review. Stable single-condition therapy or routine refill logistics carry far lower risk.

Question 28Pharmaceutical Care and Clinical Pharmacy Practice

During a medication review, a patient with type 2 diabetes reports taking glibenclamide but frequently skips meals because of shift work. What is the pharmacist's most appropriate recommendation?

  1. Advise the patient to take the dose only with meals and discuss alternative agents with the prescriber Correct answer.
  2. Advise stopping the medicine on days with irregular meals without consulting anyone
  3. Instruct the patient to double the dose on days when meals are eaten
  4. Recommend taking the medicine at bedtime regardless of meals

Explanation

Sulfonylureas such as glibenclamide stimulate insulin release and can cause hypoglycemia when meals are skipped, so the safest approach is to align dosing with meals and raise the option of a lower-risk agent with the prescriber. The pharmacist should not authorize independent dose changes or unsupervised discontinuation.

Question 29Pharmaceutical Care and Clinical Pharmacy Practice

A patient with epilepsy who has been seizure-free for years asks the pharmacist whether she can stop her antiseizure medicine because she feels well. What is the best response?

  1. Tell her to stop the medicine gradually over one week on her own
  2. Confirm that long seizure-free periods mean the medicine is no longer needed
  3. Explain that withdrawal decisions require prescriber assessment and should never be made abruptly Correct answer.
  4. Advise halving the dose immediately to test whether seizures return

Explanation

Antiseizure medicines must not be stopped abruptly because doing so can precipitate withdrawal seizures, and decisions about tapering depend on seizure type, duration of freedom, and clinical assessment. The pharmacist's role is to explain the risk and refer the patient to the prescriber for an individualized plan.

Question 30Pharmaceutical Care and Clinical Pharmacy Practice

A pharmacist is evaluating a published study of a new antihypertensive. The trial reports a statistically significant reduction in blood pressure, but the confidence interval is wide and the study enrolled only 40 patients. How should the pharmacist interpret these findings?

  1. The wide confidence interval confirms the effect is large and reliable
  2. The small sample size is irrelevant because significance was achieved
  3. The result is statistically significant but imprecise, so it should be interpreted cautiously until replicated in larger studies Correct answer.
  4. Statistical significance proves the drug is superior in all patient groups

Explanation

Statistical significance indicates that an effect is unlikely to be due to chance, but a wide confidence interval in a small trial signals imprecision and uncertainty about the true effect size. Findings should therefore be judged cautiously and confirmed by larger, well-powered studies before changing practice.

Question 31Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which laboratory parameter is used to monitor the anticoagulant effect of unfractionated heparin in acute coronary syndrome?

  1. International normalized ratio (INR)
  2. Activated partial thromboplastin time (aPTT) Correct answer.
  3. Bleeding time
  4. Platelet aggregation assay

Explanation

Unfractionated heparin potentiates antithrombin and prolongs the activated partial thromboplastin time, so aPTT is the standard monitoring test during continuous infusion. INR reflects the extrinsic pathway and is used for warfarin, not heparin.

Question 32Pharmacotherapy of Cardiovascular and Metabolic Disorders

A patient with heart failure and reduced ejection fraction is started on sacubitril/valsartan. Which prior drug must be discontinued with a washout period before starting this agent?

  1. Metoprolol
  2. An ACE inhibitor Correct answer.
  3. Spironolactone
  4. Furosemide

Explanation

Sacubitril/valsartan combines a neprilysin inhibitor with an angiotensin receptor blocker, and concurrent ACE inhibition markedly increases angioedema risk. A 36-hour washout of the ACE inhibitor is required before initiation.

Question 33Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which adverse effect is most characteristic of high-dose loop diuretic therapy in a patient with decompensated heart failure?

  1. Hypokalemia Correct answer.
  2. Metabolic alkalosis with hyperkalemia
  3. Hyperkalemia
  4. Hypernatremia

Explanation

Loop diuretics block the sodium-potassium-chloride cotransporter in the thick ascending limb, increasing distal sodium delivery and potassium loss. Hypokalemia and metabolic alkalosis are therefore typical, and potassium must be monitored.

Question 34Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which drug class is first-line antihypertensive therapy in a young patient of African ancestry without diabetes or chronic kidney disease?

  1. ACE inhibitors
  2. Beta-blockers
  3. Angiotensin receptor blockers
  4. Thiazide diuretics or calcium channel blockers Correct answer.

Explanation

In patients of African ancestry, renin-angiotensin blockade is less effective as monotherapy, so thiazide-type diuretics or dihydropyridine calcium channel blockers are preferred initial choices. This reflects lower renin status in that population.

Question 35Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which finding indicates statin-associated muscle symptoms requiring clinical reassessment rather than simple continuation?

  1. Transient muscle soreness resolving within one day
  2. Mild myalgia without creatine kinase elevation after exercise
  3. Asymptomatic creatine kinase elevation under three times the upper limit
  4. Severe proximal muscle pain with dark urine and elevated creatine kinase Correct answer.

Explanation

Severe muscle pain with dark urine and marked creatine kinase elevation suggests rhabdomyolysis, a medical emergency requiring immediate statin discontinuation and urgent evaluation. Mild symptoms without enzyme elevation can often be managed with reassessment and rechallenge.

Question 36Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which monitoring parameter is essential before and during initiation of an ACE inhibitor in a patient with diabetic nephropathy?

  1. Serum creatinine and potassium Correct answer.
  2. Thyroid-stimulating hormone
  3. Serum amylase
  4. Serum magnesium

Explanation

ACE inhibitors reduce glomerular filtration pressure and can raise creatinine and potassium, especially in chronic kidney disease. Baseline and follow-up renal function and potassium are required to detect clinically significant deterioration.

Question 37Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which oral antidiabetic agent carries a notable risk of vitamin B12 deficiency during long-term therapy?

  1. Metformin Correct answer.
  2. Dapagliflozin
  3. Pioglitazone
  4. Sitagliptin

Explanation

Long-term metformin use reduces ileal vitamin B12 absorption, and periodic monitoring is advised for patients at risk of deficiency. The other listed agents do not share this recognized association.

Question 38Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which agent is used as first-line pharmacotherapy for smoking cessation in a patient with stable cardiovascular disease?

  1. Clonidine
  2. Bupropion
  3. Nortriptyline
  4. Varenicline Correct answer.

Explanation

Varenicline is a partial nicotinic acetylcholine receptor agonist and is a first-line smoking cessation agent with demonstrated efficacy. It is preferred over second-line options such as clonidine or nortriptyline in most patients.

Question 39Pharmacotherapy of Cardiovascular and Metabolic Disorders

A patient on warfarin is prescribed trimethoprim-sulfamethoxazole for a urinary tract infection. What is the most appropriate management to prevent bleeding?

  1. Stop warfarin permanently and start aspirin
  2. Increase the warfarin dose to compensate for infection
  3. No change is needed because antibiotics do not interact with warfarin
  4. Monitor INR closely and consider reducing the warfarin dose Correct answer.

Explanation

Trimethoprim-sulfamethoxazole inhibits CYP2C9 and displaces warfarin from albumin, raising INR and bleeding risk. Close INR monitoring with a possible dose reduction is the correct approach.

Question 40Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which combination of antihypertensive agents is generally avoided because both act on the renin-angiotensin system?

  1. ACE inhibitor plus thiazide diuretic
  2. Calcium channel blocker plus ACE inhibitor
  3. Beta-blocker plus thiazide diuretic
  4. ACE inhibitor plus angiotensin receptor blocker Correct answer.

Explanation

Dual renin-angiotensin blockade with an ACE inhibitor and an ARB increases hyperkalemia, acute kidney injury, and hypotension without added benefit. Guidelines advise against combining them.

Question 41Pharmacotherapy of Cardiovascular and Metabolic Disorders

A patient with type 2 diabetes and established atherosclerotic cardiovascular disease is being optimized. Which medication reduces major adverse cardiovascular events independent of glucose lowering?

  1. Insulin glargine
  2. Glipizide
  3. Empagliflozin Correct answer.
  4. Acarbose

Explanation

SGLT2 inhibitors such as empagliflozin reduce cardiovascular death and heart failure hospitalization in patients with established cardiovascular disease. This benefit is demonstrated independently of glycemic control.

Question 42Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which electrolyte abnormality is most concerning when furosemide is combined with high-dose hydrocortisone?

  1. Hyperphosphatemia
  2. Hypercalcemia
  3. Hypokalemia Correct answer.
  4. Hyperkalemia

Explanation

Both loop diuretics and glucocorticoids promote renal potassium loss, so their combination substantially increases the risk of hypokalemia. Potassium should be monitored closely during coadministration.

Question 43Pharmacotherapy of Cardiovascular and Metabolic Disorders

A patient with atrial fibrillation and a mechanical mitral valve requires anticoagulation. Which agent is appropriate?

  1. Dabigatran
  2. Apixaban
  3. Rivaroxaban
  4. Warfarin Correct answer.

Explanation

Direct oral anticoagulants are not recommended for mechanical heart valves, where vitamin K antagonists such as warfarin remain the standard of care. This reflects trial evidence of harm with dabigatran in this population.

Question 44Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which mechanism explains the antianginal effect of ranolazine?

  1. Beta-adrenergic receptor blockade
  2. Inhibition of late sodium current in ventricular myocytes Correct answer.
  3. Inhibition of HMG-CoA reductase
  4. Blockade of L-type calcium channels

Explanation

Ranolazine inhibits the late inward sodium current, reducing intracellular calcium overload and thereby improving diastolic relaxation and reducing angina. It does not act through beta-blockade or calcium channel blockade.

Question 45Pharmacotherapy of Cardiovascular and Metabolic Disorders

A patient with heart failure and reduced ejection fraction has persistent volume overload despite furosemide. Which addition improves diuretic responsiveness by blocking distal sodium reabsorption?

  1. Mannitol
  2. Metolazone Correct answer.
  3. Spironolactone
  4. Acetazolamide

Explanation

Metolazone is a thiazide-like diuretic that blocks sodium reabsorption in the distal convoluted tubule, and sequential nephron blockade enhances diuresis when loop diuretics alone are insufficient. Electrolytes require close monitoring.

Question 46Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which statement best describes the role of ezetimibe in lipid management?

  1. It inhibits PCSK9 to increase LDL receptor recycling
  2. It inhibits intestinal cholesterol absorption and lowers LDL when added to a statin Correct answer.
  3. It binds bile acids to reduce cholesterol reabsorption
  4. It activates lipoprotein lipase to lower triglycerides

Explanation

Ezetimibe blocks the NPC1L1 transporter in the intestinal brush border, reducing cholesterol absorption and providing additional LDL lowering when combined with a statin. It does not act on PCSK9, lipoprotein lipase, or bile acid sequestration.

Question 47Pharmacotherapy of Cardiovascular and Metabolic Disorders

A patient with hypertension and gout requires a thiazide-type diuretic for blood pressure control. What is the main concern?

  1. Thiazides increase renal uric acid excretion
  2. Thiazides lower uric acid and may cause hypouricemia
  3. Thiazides raise serum uric acid and may precipitate gout flares Correct answer.
  4. Thiazides have no effect on urate handling

Explanation

Thiazide diuretics reduce renal uric acid excretion and can raise serum urate, potentially triggering gout flares. An alternative antihypertensive is often preferable in patients with a history of gout.

Question 48Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which agent is preferred for rate control in a patient with atrial fibrillation and decompensated heart failure with reduced ejection fraction?

  1. Diltiazem
  2. Atenolol
  3. Verapamil
  4. Digoxin Correct answer.

Explanation

Non-dihydropyridine calcium channel blockers are negative inotropes and should be avoided in decompensated systolic heart failure. Digoxin provides rate control without the same negative inotropic penalty and is often used in this scenario.

Question 49Pharmacotherapy of Cardiovascular and Metabolic Disorders

A patient taking simvastatin is prescribed clarithromycin for a respiratory infection. What is the most appropriate action?

  1. Replace clarithromycin with another macrolide
  2. Continue both drugs and monitor for muscle pain
  3. Double the simvastatin dose to maintain efficacy
  4. Temporarily hold the simvastatin during clarithromycin therapy Correct answer.

Explanation

Clarithromycin is a strong CYP3A4 inhibitor and markedly raises simvastatin exposure, increasing rhabdomyolysis risk. Temporarily withholding simvastatin during the antibiotic course is the recommended approach.

Question 50Pharmacotherapy of Cardiovascular and Metabolic Disorders

Which clinical parameter best guides initial insulin titration in a hospitalized patient with type 2 diabetes receiving basal-bolus therapy?

  1. Serum fructosamine measured weekly
  2. Glycated hemoglobin measured daily
  3. Random urine glucose measurements
  4. Fasting and pre-meal capillary glucose values Correct answer.

Explanation

Basal-bolus insulin adjustment relies on fasting and pre-meal glucose readings to titrate each component appropriately. HbA1c reflects long-term control and cannot guide daily dose changes.