Anti-inflammatory agents – Sulindac MCQs With Answer

Anti-inflammatory agents – Sulindac MCQs With Answer

Sulindac is a widely studied nonsteroidal anti-inflammatory drug (NSAID) and prodrug used in analgesia and inflammatory disorders. This introduction covers sulindac’s mechanism of action as a COX inhibitor, hepatic activation to the active sulfide metabolite, pharmacokinetics (absorption, protein binding, enterohepatic recycling), clinical uses in rheumatoid and osteo-arthritis, common adverse effects (GI, renal, hypersensitivity), drug interactions (warfarin, ACE inhibitors, diuretics), and monitoring considerations important for B.Pharm students. These focused points help build a solid pharmacology foundation for exam preparation and clinical practice. Now let’s test your knowledge with 50 MCQs on this topic.

Q1. Which statement best describes sulindac’s status as a drug?

• Sulindac is an active NSAID that directly inhibits COX enzymes without metabolic conversion
• Sulindac is a prodrug that is converted in the liver to an active sulfide metabolite
• Sulindac is a selective COX-2 inhibitor structurally related to celecoxib
• Sulindac is an opioid analgesic used for severe pain

Correct Answer: Sulindac is a prodrug that is converted in the liver to an active sulfide metabolite

Q2. The primary pharmacodynamic action of sulindac sulfide is:

• Stimulation of prostaglandin synthesis
• Irreversible inhibition of acetylcholinesterase
• Reversible inhibition of cyclooxygenase (COX) enzymes reducing prostaglandin synthesis
• Blockade of TNF-alpha receptors

Correct Answer: Reversible inhibition of cyclooxygenase (COX) enzymes reducing prostaglandin synthesis

Q3. Which metabolite of sulindac is pharmacologically active?

• Sulindac sulfone
• Sulindac sulfide
• Parent sulindac only
• Sulindac glucuronide

Correct Answer: Sulindac sulfide

Q4. Sulindac’s reduced gastrointestinal toxicity compared with some NSAIDs is partly due to:

• It being highly selective for COX-2 only
• Its prodrug nature with hepatic activation and enterohepatic cycling which lowers gastric mucosal exposure
• Its inability to inhibit prostaglandin synthesis
• Its administration only by intravenous route

Correct Answer: Its prodrug nature with hepatic activation and enterohepatic cycling which lowers gastric mucosal exposure

Q5. Which clinical indication is sulindac commonly used for?

• Bacterial infections
• Rheumatoid arthritis and osteoarthritis
• Type 1 diabetes mellitus
• Parkinson’s disease

Correct Answer: Rheumatoid arthritis and osteoarthritis

Q6. The main adverse effect of sulindac that requires monitoring is:

• Hypoglycemia
• Gastrointestinal bleeding and ulceration
• Hearing loss
• Hyperthyroidism

Correct Answer: Gastrointestinal bleeding and ulceration

Q7. Sulindac interacts with warfarin primarily by:

• Enhancing warfarin metabolism leading to reduced INR
• Displacing warfarin from plasma proteins and inhibiting platelet function, increasing bleeding risk
• Acting as a vitamin K analog
• Increasing warfarin renal excretion

Correct Answer: Displacing warfarin from plasma proteins and inhibiting platelet function, increasing bleeding risk

Q8. Sulindac is contraindicated or used with caution in which condition?

• Osteoporosis
• Pregnancy, especially in the third trimester
• Seasonal allergic rhinitis
• Myopia

Correct Answer: Pregnancy, especially in the third trimester

Q9. The mechanism by which NSAIDs like sulindac can cause renal impairment involves:

• Direct destruction of glomerular basement membrane by sulindac
• Reduced prostaglandin-mediated renal blood flow leading to decreased glomerular filtration
• Activation of renin-angiotensin system independent of prostaglandins
• Inhibition of renal sodium channels directly

Correct Answer: Reduced prostaglandin-mediated renal blood flow leading to decreased glomerular filtration

Q10. Which statement about sulindac pharmacokinetics is correct?

• Sulindac is primarily excreted unchanged in urine
• Sulindac undergoes hepatic reduction to an active sulfide and oxidative conversion to a sulfone
• Sulindac has no enterohepatic recirculation
• Sulindac is administered as an inhaled spray for systemic action

Correct Answer: Sulindac undergoes hepatic reduction to an active sulfide and oxidative conversion to a sulfone

Q11. Which laboratory parameter should be monitored during long-term sulindac therapy?

• Serum amylase only
• Renal function (serum creatinine) and liver enzymes
• Serum insulin
• Pulmonary function tests

Correct Answer: Renal function (serum creatinine) and liver enzymes

Q12. Sulindac’s analgesic effect is primarily due to:

• Central opioid receptor agonism
• Inhibition of prostaglandin synthesis which reduces peripheral sensitization of nociceptors
• Blocking sodium channels in neurons
• Increasing serotonin levels in synapses

Correct Answer: Inhibition of prostaglandin synthesis which reduces peripheral sensitization of nociceptors

Q13. Which enzyme family is directly inhibited by sulindac sulfide?

• Cyclooxygenases (COX-1 and COX-2)
• CYP3A4 exclusively
• Monoamine oxidase
• DNA polymerase

Correct Answer: Cyclooxygenases (COX-1 and COX-2)

Q14. Enterohepatic recycling of sulindac contributes to:

• Decreased drug half-life
• Prolonged duration of action and possible prolonged exposure of GI mucosa
• Exclusive renal excretion
• Immediate drug inactivation

Correct Answer: Prolonged duration of action and possible prolonged exposure of GI mucosa

Q15. Which of the following is a common dose form for sulindac?

• Intravenous infusion only
• Oral tablets
• Transdermal patch
• Nasal spray

Correct Answer: Oral tablets

Q16. Sulindac’s chemical class is best described as:

• A sulfonylurea antidiabetic
• An indene acetic acid derivative (sulfinyl indene acetic acid)
• A benzodiazepine
• A macrolide antibiotic

Correct Answer: An indene acetic acid derivative (sulfinyl indene acetic acid)

Q17. A major advantage of sulindac over some other NSAIDs is:

• Complete absence of adverse effects
• Prodrug feature that may reduce direct gastric mucosal irritation
• Absolute selectivity for COX-1 leading to less bleeding
• It increases platelet aggregation

Correct Answer: Prodrug feature that may reduce direct gastric mucosal irritation

Q18. Sulindac sulfide’s inhibition of COX reduces formation of which mediator?

• Adenosine triphosphate (ATP)
• Prostaglandins
• Corticosteroids
• Insulin

Correct Answer: Prostaglandins

Q19. Which of the following adverse reactions is associated with sulindac and should prompt discontinuation?

• Mild headache lasting an hour
• Skin rash or signs of hypersensitivity such as Stevens-Johnson syndrome
• Temporary mild dry mouth
• Transient increase in appetite

Correct Answer: Skin rash or signs of hypersensitivity such as Stevens-Johnson syndrome

Q20. Sulindac may reduce the antihypertensive effect of which drug class?

• Beta blockers only
• ACE inhibitors and diuretics due to reduced prostaglandin-mediated renal effects
• Calcium channel blockers by CYP induction
• Statins by direct receptor blockade

Correct Answer: ACE inhibitors and diuretics due to reduced prostaglandin-mediated renal effects

Q21. In patients with a history of peptic ulcer disease, sulindac should be:

• Prescribed at high doses without precautions
• Used with caution; consider gastroprotection (PPI) or alternative therapy
• Used topically to avoid GI effects
• Combined with another NSAID for synergistic effect

Correct Answer: Used with caution; consider gastroprotection (PPI) or alternative therapy

Q22. Which metabolic pathway is important for activation of sulindac?

• Reduction of the sulfoxide to sulfide in the liver
• Hydrolysis by peptidases in plasma
• Oxidative deamination in kidneys
• Direct phosphorylation by kinases

Correct Answer: Reduction of the sulfoxide to sulfide in the liver

Q23. Sulindac sulfone is generally considered:

• The most active COX inhibitor metabolite
• An inactive or less active oxidative metabolite
• A neurotransmitter analog
• A pro-coagulant compound

Correct Answer: An inactive or less active oxidative metabolite

Q24. The risk of cardiovascular events with NSAIDs like sulindac is thought to arise from:

• Enhanced prostacyclin (PGI2) production only
• An imbalance between thromboxane A2 and prostacyclin leading to prothrombotic state
• Direct myocardial necrosis unrelated to COX
• Activation of beta-adrenergic receptors

Correct Answer: An imbalance between thromboxane A2 and prostacyclin leading to prothrombotic state

Q25. Which patient factor may prolong sulindac action and requires dose adjustment?

• Young age with hypermetabolism
• Severe hepatic impairment affecting reduction and clearance
• Recent vaccination
• High dietary fiber intake

Correct Answer: Severe hepatic impairment affecting reduction and clearance

Q26. Which monitoring sign could indicate sulindac-induced renal dysfunction?

• Decreased serum creatinine
• Increased serum creatinine and reduced urine output
• Increased hair growth
• Improved hearing

Correct Answer: Increased serum creatinine and reduced urine output

Q27. For B.Pharm students, the mechanism-based classification of sulindac is:

• Nonsteroidal anti-inflammatory drug (NSAID) with COX inhibition
• Anti-epileptic sodium channel blocker
• Benzodiazepine receptor agonist
• ACE inhibitor

Correct Answer: Nonsteroidal anti-inflammatory drug (NSAID) with COX inhibition

Q28. Which statement about sulindac and platelet function is correct?

• Sulindac irreversibly inhibits platelet aggregation like aspirin
• Sulindac can impair platelet aggregation reversibly, increasing bleeding risk
• Sulindac enhances platelet aggregation
• Sulindac has no effect on platelets

Correct Answer: Sulindac can impair platelet aggregation reversibly, increasing bleeding risk

Q29. Which co-administration increases risk of GI bleeding with sulindac?

• Proton pump inhibitors
• Low-dose aspirin or other NSAIDs
• Folic acid supplements
• Topical emollients

Correct Answer: Low-dose aspirin or other NSAIDs

Q30. Sulindac’s bioactivation requires which organ primarily?

• Kidney
• Liver
• Lungs
• Spleen

Correct Answer: Liver

Q31. Which adverse effect is more likely with sulindac compared to paracetamol?

• Hepatotoxicity and gastric ulceration
• Severe hypoglycemia
• Bronchospasm only seen with paracetamol
• Neuromuscular blockade

Correct Answer: Hepatotoxicity and gastric ulceration

Q32. Sulindac’s absorption after oral administration is generally described as:

• Poor and unpredictable with zero bioavailability
• Well absorbed from the gastrointestinal tract with good oral bioavailability
• Only absorbed when given intravenously
• Only absorbed via the transdermal route

Correct Answer: Well absorbed from the gastrointestinal tract with good oral bioavailability

Q33. Which patient history should raise caution before prescribing sulindac?

• History of controlled seasonal allergies only
• History of peptic ulcer disease and bleeding disorders
• Previous appendectomy decades ago
• History of mild myopia

Correct Answer: History of peptic ulcer disease and bleeding disorders

Q34. Which statement about sulindac and asthma is relevant?

• NSAIDs like sulindac can precipitate bronchospasm in aspirin-sensitive asthmatics
• Sulindac is the preferred NSAID in aspirin-exacerbated respiratory disease
• Sulindac cures asthma by anti-inflammatory action
• Sulindac has no respiratory effects

Correct Answer: NSAIDs like sulindac can precipitate bronchospasm in aspirin-sensitive asthmatics

Q35. Which metabolic product of sulindac is associated with lower COX inhibition?

• Sulindac sulfide (active)
• Sulindac sulfone (less active/inactive)
• Sulindac phosphate (nonexistent)
• Acetyl-sulindac (irrelevant)

Correct Answer: Sulindac sulfone (less active/inactive)

Q36. Which drug interaction is important to counsel about when starting sulindac?

• Concurrent use with metformin increases glucose levels
• Concurrent use with anticoagulants increases bleeding risk
• Concurrent use with vitamin C potentiates sulindac analgesia
• Concurrent use with topical steroids causes systemic steroid levels to fall

Correct Answer: Concurrent use with anticoagulants increases bleeding risk

Q37. Sulindac’s effect on prostaglandins in the gastric mucosa leads to:

• Increased mucous and bicarbonate secretion
• Decreased protective prostaglandins causing mucosal vulnerability
• Enhanced mucosal blood flow exclusively
• Immediate mucosal regeneration

Correct Answer: Decreased protective prostaglandins causing mucosal vulnerability

Q38. In pharmacology exams, sulindac is often contrasted with which NSAID due to differing COX selectivity?

• Acetaminophen (paracetamol)
• Aspirin or celecoxib to discuss COX-1 vs COX-2 selectivity
• Insulin
• Amoxicillin

Correct Answer: Aspirin or celecoxib to discuss COX-1 vs COX-2 selectivity

Q39. Which population requires dose adjustment or close monitoring when using sulindac?

• Patients with severe hepatic impairment and the elderly
• Healthy young adults with no comorbidities
• Patients with nearsightedness only
• Those taking daily multivitamins

Correct Answer: Patients with severe hepatic impairment and the elderly

Q40. Which test would be useful before starting chronic sulindac therapy?

• Baseline liver function tests and renal function tests
• Baseline audiometry
• Visual field testing
• Skin biopsy

Correct Answer: Baseline liver function tests and renal function tests

Q41. Sulindac’s analgesic dosing strategy for acute pain commonly emphasizes:

• Single lifetime dose only
• Using the lowest effective dose for the shortest duration to limit adverse effects
• High-dose continuous therapy regardless of response
• Using it only in combination with opioids

Correct Answer: Using the lowest effective dose for the shortest duration to limit adverse effects

Q42. Which structural feature differentiates sulindac from classical arylpropionic acids like ibuprofen?

• Sulindac contains a sulfoxide group in an indene acetic acid framework
• Sulindac is a peptide
• Sulindac is a steroidal molecule
• Sulindac is identical in structure to ibuprofen

Correct Answer: Sulindac contains a sulfoxide group in an indene acetic acid framework

Q43. Which adverse effect profile is most likely less pronounced with sulindac because it is a prodrug?

• Hepatic enzyme elevations
• Direct topical gastric mucosal irritation compared with non-prodrug NSAIDs
• Systemic renal effects
• CNS sedation

Correct Answer: Direct topical gastric mucosal irritation compared with non-prodrug NSAIDs

Q44. Sulindac’s active sulfide form is regenerated from the sulfoxide by which type of reaction?

• Oxidation
• Reduction
• Hydrolysis
• Photolysis

Correct Answer: Reduction

Q45. Which adverse hematologic effect can occur with sulindac use?

• Agranulocytosis and aplastic anemia in rare cases
• Polycythemia vera as a common effect
• Immediate erythropoietin surge
• Guaranteed thrombocytosis

Correct Answer: Agranulocytosis and aplastic anemia in rare cases

Q46. Which counselling point is appropriate for a patient starting sulindac?

• Take on an empty stomach always to improve absorption
• Report any signs of GI bleeding, rash, or reduced urine output; take with food to reduce GI upset
• Stop other antihypertensives immediately
• Increase alcohol intake to enhance efficacy

Correct Answer: Report any signs of GI bleeding, rash, or reduced urine output; take with food to reduce GI upset

Q47. Which assay type could be used to measure sulindac or metabolites in plasma for pharmacokinetic studies?

• High-performance liquid chromatography (HPLC) with UV or mass spectrometric detection
• Urine dipstick only
• Potentiometric glucose test
• Visual color matching

Correct Answer: High-performance liquid chromatography (HPLC) with UV or mass spectrometric detection

Q48. Sulindac may be preferred in some patients over other NSAIDs because:

• It has no effect on renal prostaglandins
• Its prodrug properties may reduce direct gastric irritation and it has an active systemic metabolite
• It is completely free of drug interactions
• It causes immediate platelet activation

Correct Answer: Its prodrug properties may reduce direct gastric irritation and it has an active systemic metabolite

Q49. Which descriptor best summarizes sulindac’s COX selectivity?

• Highly COX-2 selective like celecoxib
• Nonselective COX inhibitor with activity against both COX-1 and COX-2 after activation
• No interaction with COX enzymes
• Exclusive COX-3 inhibitor

Correct Answer: Nonselective COX inhibitor with activity against both COX-1 and COX-2 after activation

Q50. For an exam question on drug interactions, combining sulindac with which drug requires caution due to increased lithium levels?

• Metformin
• Thiazide diuretics and NSAIDs can increase lithium levels; caution is needed
• Propranolol lowers lithium levels
• Vitamin D prevents lithium interaction

Correct Answer: Thiazide diuretics and NSAIDs can increase lithium levels; caution is needed

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