Antihypertensives Practice Questions

Q: A 25 -year-old male presented to the emergency department with head trauma due to a road traffic accident. In the hospital, the patient developed seizures, and an emergency CT scan revealed widespread cerebral edema. Which of the following is the diuretic of choice for cerebral edema in this patient?

A. Mannitol. ***Mannitol*** - **Mannitol** is an osmotic diuretic that creates an osmotic gradient, drawing water from the brain parenchyma into the intravascular space, thereby reducing **cerebral edema**. - Its rapid onset of action and ability to cross an intact blood-brain barrier sparingly makes it the drug of choice for acute management of elevated intracranial pressure due to **cerebral edema**. *Spironolactone* - **Spironolactone** is a potassium-sparing diuretic that primarily acts on the distal tubules to inhibit aldosterone, leading to sodium and water excretion. - It is unsuitable for acute cerebral edema as its diuretic effect is too slow and it does not create the necessary osmotic gradient. *Furosemide* - **Furosemide** is a loop diuretic that inhibits sodium-potassium-chloride co-transporter in the loop of Henle, leading to significant diuresis. - While it can remove fluid, it does not create the same osmotic gradient as mannitol and is less effective at rapidly reducing **intracranial pressure** directly related to cerebral edema. *Hydrochlorothiazide* - **Hydrochlorothiazide** is a thiazide diuretic that primarily acts on the distal convoluted tubule to inhibit sodium reabsorption. - Its diuretic action is too slow and relatively mild for the acute management of severe conditions like **cerebral edema**. *Acetazolamide* - **Acetazolamide** is a carbonic anhydrase inhibitor that reduces CSF production and has a role in chronic management of idiopathic intracranial hypertension. - However, it is not suitable for acute cerebral edema following trauma as its onset is too slow and its diuretic effect is relatively weak compared to osmotic diuretics.

Q: A person was taking an antihypertensive drug and continued taking it despite developing constipation, dry mouth, and dizziness. He was taking it regularly but forgot to take it during a trip abroad and has now developed a hypertensive emergency. Which antihypertensive was he likely taking?

Clonidine. **Clonidine** - The described symptoms of **constipation, dry mouth, and dizziness** are common side effects of **clonidine**, an alpha-2 adrenergic agonist. - The development of a **hypertensive emergency** upon abrupt cessation of the drug strongly suggests clonidine, as it is known for causing **rebound hypertension** due to a sudden increase in sympathetic outflow. *Amlodipine* - **Amlodipine**, a dihydropyridine calcium channel blocker, primarily causes **peripheral edema, headache, and flushing**, not typically constipation or rebound hypertension upon withdrawal. - While it can cause dizziness, the combination of side effects and withdrawal symptoms does not fit amlodipine. *Lisinopril* - **Lisinopril**, an ACE inhibitor, is known for causing **cough and angioedema**. - It does not typically cause constipation, dry mouth, or rebound hypertension upon discontinuation. *Telmisartan* - **Telmisartan**, an angiotensin receptor blocker (ARB), generally has a **favorable side effect profile** and does not commonly cause constipation or dry mouth. - Withdrawal of ARBs does not typically lead to a **hypertensive emergency** in the way clonidine does. *Metoprolol* - **Metoprolol**, a beta-blocker, can cause **fatigue and bradycardia** but does not typically cause the anticholinergic effects (dry mouth, constipation) seen with clonidine. - While abrupt withdrawal of beta-blockers can lead to rebound tachycardia and hypertension, the severity and acute nature of the hypertensive emergency described is more characteristic of clonidine withdrawal.

Q: A patient presents with hypertension and has a history of renal stones, along with several episodes of renal colic. Which diuretic is the most appropriate to use?

Hydrochlorothiazide. **Hydrochlorothiazide** - **Thiazide diuretics** like hydrochlorothiazide reduce urinary calcium excretion, which is beneficial in patients with a history of **calcium renal stones**. - This effect helps prevent the recurrence of renal stones while also treating hypertension. - Among thiazide and thiazide-like diuretics, hydrochlorothiazide has the **most established evidence** for preventing calcium stone recurrence. *Furosemide* - Furosemide is a **loop diuretic** that increases urinary calcium excretion, which would exacerbate the risk of renal stone formation. - While effective for hypertension, its effect on calcium makes it unsuitable for this patient. *Ethacrynic acid* - Ethacrynic acid is also a **loop diuretic** with similar effects to furosemide, including increasing urinary calcium excretion. - This makes it an inappropriate choice for a patient with a history of renal stones. *Spironolactone* - Spironolactone is a **potassium-sparing diuretic** that works by antagonizing aldosterone, primarily affecting sodium and potassium excretion. - It does not significantly impact urinary calcium excretion in a way that would prevent calcium renal stones, nor is it a first-line agent for hypertension with co-existing renal stones. *Indapamide* - Indapamide is a **thiazide-like diuretic** with some calcium-retaining properties, but it is less effective than hydrochlorothiazide in reducing calcium excretion. - While it can be used for hypertension, **hydrochlorothiazide is preferred** specifically for preventing calcium stone recurrence due to stronger evidence and greater effect on reducing urinary calcium.

Q: Which of the following cardioselective betablockers has been shown to decrease mortality in patients with congestive heart failure?

Bisoprolol. ***Bisoprolol*** - **Bisoprolol** is a highly cardioselective beta-1 blocker that has been extensively studied and proven to reduce mortality and morbidity in patients with **systolic congestive heart failure**. - It is one of the **"big three" beta-blockers** (along with **carvedilol** and **metoprolol succinate**) recommended for chronic heart failure management by major cardiology guidelines, supported by the **CIBIS-II trial**. *Atenolol* - **Atenolol** is a cardioselective beta-1 blocker commonly used for hypertension and angina. - Despite being cardioselective, it has **not been shown to reduce mortality** in patients with chronic heart failure and is generally **not recommended** for this indication due to lack of supportive clinical trial evidence. *Propranolol* - **Propranolol** is a non-selective beta-blocker that blocks both beta-1 and beta-2 receptors. - While effective for conditions like angina and arrhythmias, it is generally **not recommended** for chronic heart failure due to its non-selectivity and lack of evidence for mortality reduction in this specific patient population. *Labetalol* - **Labetalol** is an alpha- and beta-adrenergic blocker, often used in hypertensive emergencies and for managing hypertension in pregnancy. - It is **not indicated** for mortality reduction in chronic heart failure due to its different pharmacological profile and lack of clinical trial evidence supporting its use for this purpose. *Pindolol* - **Pindolol** is a non-selective beta-blocker with **intrinsic sympathomimetic activity (ISA)**, meaning it partially stimulates beta-receptors while blocking the effects of norepinephrine and epinephrine. - Beta-blockers with ISA are generally **contraindicated** in heart failure because their partial agonist activity can potentially worsen myocardial function, and they have not shown any mortality benefit.

Q: A hypertensive patient wants to conceive. Which of the following medications needs to be stopped before pregnancy?

ACE inhibitors. ***ACE inhibitors*** - **ACE inhibitors** are **teratogenic** and can cause **fetal kidney damage**, **oligohydramnios**, and **fetal death** if used during pregnancy. - They should be discontinued before conception or immediately upon pregnancy confirmation, and an alternative safe antihypertensive should be initiated. *Alpha Methyl dopa* - **Alpha-methyldopa** is considered one of the **first-line agents** for managing **hypertension in pregnancy** due to its established safety profile. - It reduces peripheral resistance without significantly affecting renal or uteroplacental blood flow. *Calcium Channel Blockers* - **Calcium channel blockers (CCBs)** like nifedipine and amlodipine are **generally considered safe** for use during pregnancy, especially dihydropyridines. - They are often used as **second-line treatments** for managing hypertension in pregnant women. *Labetalol* - **Labetalol** is a **beta-blocker** that is widely used and considered **safe** for treating **hypertension in pregnancy**. - It effectively lowers blood pressure without significant adverse effects on the fetus. *Hydralazine* - **Hydralazine** is a direct vasodilator that is **safe** for use in pregnancy and is commonly used for **acute management** of severe hypertension in pregnant women. - It has a long history of safe use during pregnancy without teratogenic effects.

Question 1

A 25 -year-old male presented to the emergency department with head trauma due to a road traffic accident. In the hospital, the patient developed seizures, and an emergency CT scan revealed widespread cerebral edema. Which of the following is the diuretic of choice for cerebral edema in this patient?

Accepted Answer

A. Mannitol

Answer

B. Spironolactone

Answer

C. Furosemide

Answer

D. Hydrochlorothiazide

Answer

E. Acetazolamide

Question 2

A person was taking an antihypertensive drug and continued taking it despite developing constipation, dry mouth, and dizziness. He was taking it regularly but forgot to take it during a trip abroad and has now developed a hypertensive emergency. Which antihypertensive was he likely taking?

Accepted Answer

Clonidine

Answer

Amlodipine

Answer

Lisinopril

Answer

Telmisartan

Answer

Metoprolol

Question 3

A patient presents with hypertension and has a history of renal stones, along with several episodes of renal colic. Which diuretic is the most appropriate to use?

Accepted Answer

Hydrochlorothiazide

Answer

Furosemide

Answer

Ethacrynic acid

Answer

Spironolactone

Answer

Indapamide

Question 4

Which of the following cardioselective betablockers has been shown to decrease mortality in patients with congestive heart failure?

Accepted Answer

Bisoprolol

Answer

Propranolol

Answer

Labetalol

Answer

Pindolol

Answer

Atenolol

Question 5

A hypertensive patient wants to conceive. Which of the following medications needs to be stopped before pregnancy?

Accepted Answer

ACE inhibitors

Answer

Alpha Methyl dopa

Answer

Calcium Channel Blockers

Answer

Labetalol

Answer

Hydralazine

Antihypertensives — MCQs

Antihypertensives — MCQs

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