Analgesics and Anti-inflammatory Drugs Practice Questions

Q: Abatacept, a drug inhibiting co-stimulation is used for:

Rheumatoid arthritis. ***Rheumatoid arthritis***- **Abatacept** is a **selective T-cell co-stimulation modulator** that inhibits the activation of T lymphocytes, which are crucial in the pathogenesis of rheumatoid arthritis.- By binding to **CD80 and CD86** on antigen-presenting cells, it prevents their interaction with **CD28** on T cells, thus blocking a key co-stimulatory signal required for full T-cell activation [1].*SLE (Systemic Lupus Erythematosus)*- While T-cell activation plays a role in SLE, abatacept has shown **limited efficacy** in clinical trials for this condition, and its use is not standard.- The dominant mechanism in SLE often involves **B-cell overactivity** and autoantibody production, making other targeted therapies more effective.*Sjogren syndrome*- Sjogren syndrome is characterized by lymphocytic infiltration of exocrine glands, but abatacept is **not a primary treatment** or widely indicated for this condition.- The main focus of treatment for Sjogren's is typically symptomatic management and immunosuppression with other agents.*Scleroderma (Systemic Sclerosis)*- Scleroderma involves **fibrosis** and vascular damage with complex immunological mechanisms, but abatacept has **not demonstrated significant benefit** in clinical studies.- The disease often has more prominent involvement of **fibroblasts** and different immunological pathways that are not adequately targeted by abatacept.

Q: FK-506 is a

Calcineurin inhibitor. ***Calcineurin inhibitor*** - FK-506, also known as **tacrolimus**, is a potent **immunosuppressant** that inhibits the activity of calcineurin. - By inhibiting **calcineurin**, it prevents the dephosphorylation of **NFAT (Nuclear Factor of Activated T cells)**, thereby suppressing T-cell activation and proliferation. *Opioid analgesic* - **Opioid analgesics** are medications that relieve pain by binding to **opioid receptors** in the central nervous system. - Examples include morphine and fentanyl, which have a different mechanism of action and clinical use compared to FK-506. *Immunoglobulin antibody* - **Immunoglobulin antibodies** are proteins produced by plasma cells that target specific antigens to neutralize pathogens or toxins. - While therapeutic antibodies exist (e.g., monoclonal antibodies), FK-506 is a **small molecule drug** with a distinct mechanism of action, not an antibody. *Non depolarising muscle relaxant* - **Non-depolarizing muscle relaxants** are drugs that block the acetylcholine receptor at the neuromuscular junction, leading to muscle paralysis. - Examples include rocuronium and atracurium, which are used in anesthesia to facilitate intubation and ventilation, and are distinct from immunosuppressants.

Q: Drug causing oliguria through prostaglandin inhibition is:

Aspirin. ***Aspirin*** - **Aspirin** and other **NSAIDs** cause oliguria by **inhibiting cyclooxygenase (COX)**, which reduces prostaglandin synthesis - Prostaglandins (especially PGE2 and PGI2) normally maintain renal vasodilation and adequate glomerular filtration - **Inhibition leads to**: Afferent arteriolar vasoconstriction → ↓ Renal blood flow → ↓ GFR → **Oliguria** - **High-risk patients**: Pre-existing renal disease, heart failure, volume depletion, elderly - This is a **hemodynamic/functional** renal impairment *Montelukast* - **Leukotriene receptor antagonist** used for asthma and allergic rhinitis - Acts on airways, not kidneys - No significant association with oliguria or renal dysfunction *Diazepam* - **Benzodiazepine** acting on CNS GABA receptors - Used for anxiety, seizures, muscle relaxation - No direct renal effects or oliguria association *Acyclovir* - **Antiviral drug** that can cause nephrotoxicity via **crystal formation** in renal tubules (crystal nephropathy) - Can lead to acute kidney injury and oliguria, especially with rapid IV infusion or dehydration - However, mechanism is **direct tubular toxicity**, NOT prostaglandin inhibition - The question specifically asks for prostaglandin-mediated oliguria, making **Aspirin** the correct answer

Q: A drug used in acute gout -

Colchicine. ***Colchicine*** - **Colchicine** is an anti-inflammatory drug that is effective in treating acute gout flares by inhibiting neutrophil migration and activation. - It is often used as a first-line treatment for acute gout, particularly in its early stages. *Sulfinpyrazone* - **Sulfinpyrazone** is a uricosuric agent, meaning it increases the excretion of uric acid via the kidneys. - It is used for **long-term management** of chronic gout, not for acute attacks. *Probenecid* - **Probenecid** is also a uricosuric drug that works by inhibiting the reabsorption of uric acid in the renal tubules. - Like sulfinpyrazone, it is used for **prophylaxis** in chronic gout to lower serum uric acid levels, not for an acute flare. *Allopurinol* - **Allopurinol** is a xanthine oxidase inhibitor, which reduces the production of uric acid in the body. - It is a cornerstone of **chronic gout management** to prevent future attacks but is not indicated for the immediate treatment of an acute flare as it can sometimes worsen the acute attack initially.

Q: A drug that is effective for rheumatoid arthritis but is not appropriate for osteoarthritis is :

Infliximab. ***Infliximab*** - **Infliximab** is a **biologic disease-modifying antirheumatic drug (DMARD)**, specifically a TNF-alpha inhibitor, used to treat **autoimmune inflammatory conditions** like rheumatoid arthritis. - Its mechanism involves modulating the immune system to reduce inflammation, which is not applicable to the **degenerative process** seen in osteoarthritis. *Rofecoxib* - **Rofecoxib** was a **COX-2 selective NSAID** used for pain and inflammation in both rheumatoid arthritis and osteoarthritis. - It was withdrawn from the market due to increased cardiovascular risk, but its initial indication covered both conditions for symptomatic relief. *Acetaminophen* - **Acetaminophen** (paracetamol) is an **analgesic** and **antipyretic** primarily used for pain relief in both osteoarthritis and rheumatoid arthritis. - It does not have significant anti-inflammatory properties and therefore is not a disease-modifying agent for rheumatoid arthritis. *Ketorolac* - **Ketorolac** is a potent **non-selective NSAID** commonly used for **acute pain** of moderate to severe intensity. - It provides symptomatic relief for pain and inflammation in both osteoarthritis and rheumatoid arthritis but does not alter the disease course in either condition.

Q: What is the mechanism of action of colchicine in acute gout?

Inhibition of leukocyte migration and phagocytosis. ***Inhibition of leukocyte migration and phagocytosis*** - Colchicine primarily exerts its anti-inflammatory effect in acute gout by **binding to tubulin**, which inhibits microtubule polymerization. - This action disrupts essential cellular functions in inflammatory cells, particularly **neutrophils**, thereby reducing their migration to inflamed sites and their ability to phagocytose uric acid crystals. *Renal disease involving interstitial tissues* - This option describes a potential complication or manifestation of gout, such as **urate nephropathy**, rather than the mechanism of action of colchicine. - Colchicine does not directly target or treat pre-existing renal interstitial tissue disease as its primary mechanism for acute gout relief. *Uric acid nephrolithiasis* - This condition involves the formation of **kidney stones from uric acid** and is a consequence of chronic hyperuricemia. - Colchicine is not used to acutely treat or prevent the formation of uric acid kidney stones; its role is in managing the inflammatory arthritis of gout. *Deficiency of enzyme Xanthine oxidase* - **Xanthine oxidase** is an enzyme involved in the production of uric acid, and its inhibition (e.g., by allopurinol or febuxostat) is a strategy to lower uric acid levels in the blood. - Colchicine does not affect xanthine oxidase activity; it works downstream by modulating the inflammatory response to uric acid crystals.

Q: Gout is NOT caused by which of the following?

Sulfinpyrazone. ***Sulfinpyrazone*** - **Sulfinpyrazone** is a **uricosuric agent** [1] that *increases* the excretion of uric acid, thereby *reducing* serum uric acid levels. - This medication is used to *treat* gout by preventing attacks, rather than causing them [3]. *Aspirin* - **Low-dose aspirin** can *inhibit* the renal tubular secretion of uric acid, which can lead to an *increase* in serum uric acid levels and potentially precipitate a gout attack [4]. - High doses of aspirin are uricosuric, meaning they increase uric acid excretion, but the more commonly used low doses tend to cause hyperuricemia. *Chlorthalidone* - **Chlorthalidone** is a **thiazide-like diuretic** that *reduces* uric acid excretion by the kidneys, thus *elevating* serum uric acid levels [2]. - Increased serum uric acid levels can lead to the formation of uric acid crystals and trigger acute gout attacks [5]. *Pyrazinamide* - **Pyrazinamide**, an anti-tuberculosis drug, is well-known to *inhibit* the renal tubular excretion of uric acid. - This inhibition leads to **hyperuricemia** and can consequently cause or exacerbate gout.

Q: Tocilizumab used against rheumatoid arthritis is a monoclonal antibody against:

Interleukin-6 receptor. ***Interleukin-6 receptor*** - **Tocilizumab** is a recombinant **humanized monoclonal antibody** that targets and blocks the **interleukin-6 (IL-6) receptor**. - By blocking the IL-6 receptor, tocilizumab inhibits the signaling of IL-6, a **pro-inflammatory cytokine** implicated in the pathogenesis of **rheumatoid arthritis (RA)** and other autoimmune diseases. *Interleukin-5 receptor* - Monoclonal antibodies targeting the **interleukin-5 receptor (IL-5R)**, such as **benralizumab**, are used primarily for **severe asthma with an eosinophilic phenotype**, not rheumatoid arthritis. - Blocking IL-5R reduces the production and survival of **eosinophils**, which are key effector cells in allergic inflammation. *Interleukin-5* - Antibodies against **interleukin-5 (IL-5)**, like **mepolizumab** and **reslizumab**, are also indicated for **severe eosinophilic asthma**. - IL-5 directly promotes the growth, differentiation, and activation of **eosinophils**, a mechanism distinct from rheumatoid arthritis pathogenesis. *Interleukin-6* - While **interleukin-6 (IL-6)** is a pro-inflammatory cytokine, tocilizumab directly targets its **receptor**, not the cytokine itself. - Other biologics might target the cytokine directly, but tocilizumab's mechanism involves **receptor blockade** to prevent IL-6 binding and signaling.

Q: Drug X is useful in the treatment of rheumatoid arthritis. It is available only in the parenteral formulation and its mechanism of action is antagonism of tumor necrosis factor. Which of the following can be X?

Etanercept. ***Etanercept*** - **Etanercept** is a **tumor necrosis factor (TNF)-alpha inhibitor** used in the treatment of **rheumatoid arthritis** [1], and it is administered via **subcutaneous injection** (parenteral) [1]. - Its mechanism of action involves binding to and **inactivating TNF-alpha**, a key cytokine in the inflammatory process of rheumatoid arthritis [1].*Cyclosporine* - **Cyclosporine** is an **immunosuppressant** that primarily acts by inhibiting **calcineurin**, thereby reducing T-lymphocyte activity, not directly antagonizing TNF. - While used in some autoimmune conditions, it is available in **oral and intravenous formulations** and is not primarily identified as a TNF antagonist.*Phenylbutazone* - **Phenylbutazone** is a **nonsteroidal anti-inflammatory drug (NSAID)** that inhibits **prostaglandin synthesis**, providing symptomatic relief from pain and inflammation. - It does not target TNF and is associated with significant **adverse effects**, leading to its limited use in modern medicine.*Penicillamine* - **Penicillamine** is a **disease-modifying antirheumatic drug (DMARD)** with a mechanism of action that is not fully understood, but it is thought to reduce immune complex formation and suppress T-cell activity. - It is an **oral medication** and its primary action is not TNF antagonism; its use has largely been replaced by newer, more effective DMARDs.

Question 1

Abatacept, a drug inhibiting co-stimulation is used for:

Accepted Answer

Rheumatoid arthritis

Answer

SLE

Answer

Sjogren syndrome

Answer

Scleroderma

Question 2

FK-506 is a

Accepted Answer

Calcineurin inhibitor

Answer

Opioid analgesic

Answer

Immunoglobulin antibody

Answer

Non depolarising muscle relaxant

Question 3

Drug causing oliguria through prostaglandin inhibition is:

Accepted Answer

Aspirin

Answer

Montelukast

Answer

Diazepam

Answer

Acyclovir

Question 4

A drug used in acute gout -

Accepted Answer

Colchicine

Answer

Sulfinpyrazone

Answer

Allopurinol

Answer

Probenecid

Question 5

The primary goal of glucocorticoid treatment in rheumatoid arthritis is -

Accepted Answer

Suppression of inflammation and improvement in functional capacity

Answer

Prevention of suppression of the hypothalamic pituitary-adrenal axis

Answer

Development of a sense of well-being in the patient

Answer

Reversal of the degenerative process

Question 6

A drug that is effective for rheumatoid arthritis but is not appropriate for osteoarthritis is :

Accepted Answer

Infliximab

Answer

Rofecoxib

Answer

Acetaminophen

Answer

Ketorolac

Question 7

What is the mechanism of action of colchicine in acute gout?

Accepted Answer

Inhibition of leukocyte migration and phagocytosis

Answer

Renal disease involving interstitial tissues

Answer

Uric acid nephrolithiasis

Answer

Deficiency of enzyme Xanthine oxidase

Question 8

Gout is NOT caused by which of the following?

Accepted Answer

Sulfinpyrazone

Answer

Aspirin

Answer

Chlorthalidone

Answer

Pyrazinamide

Question 9

Tocilizumab used against rheumatoid arthritis is a monoclonal antibody against:

Accepted Answer

Interleukin-6 receptor

Answer

Interleukin-5 receptor

Answer

Interleukin-5

Answer

Interleukin-6

Question 10

Drug X is useful in the treatment of rheumatoid arthritis. It is available only in the parenteral formulation and its mechanism of action is antagonism of tumor necrosis factor. Which of the following can be X?

Accepted Answer

Etanercept

Answer

Cyclosporine

Answer

Phenylbutazone

Answer

Penicillamine

Analgesics and Anti-inflammatory Drugs — MCQs

Analgesics and Anti-inflammatory Drugs — MCQs

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