Analgesics and Anti-inflammatory Drugs Practice Questions

Q: Which of the following statements about colchicine is/are true?

All of the options are true. ***All of the options are true***- All three statements accurately describe different properties and clinical uses of colchicine, making this the correct answer. Causes metaphase arrest during cell division- Colchicine binds to **tubulin dimers**, preventing their polymerization into **microtubules** [2]- This disrupts the mitotic spindle, causing cells to arrest in **metaphase** [2]- This property is utilized in **cytogenetic studies** for karyotyping- It forms the basis of colchicine's **anti-proliferative effects** [2] Inhibits neutrophil migration- Colchicine's disruption of **microtubules** impairs neutrophil **chemotaxis** and migration to sites of inflammation [2]- It reduces neutrophil adhesion to endothelium and decreases **phagocytosis** [2]- Inhibits release of **inflammatory mediators** (leukotrienes, cytokines) [1, 2]- This anti-inflammatory mechanism is crucial for its therapeutic effect in **gout** [1, 2] Used in the treatment of gout- FDA-approved for **acute gout attacks** and **prophylaxis** [2, 3]- Effective in **familial Mediterranean fever** [2]- Used in **pericarditis** and other inflammatory conditions [2]- Works by reducing the inflammatory response to **urate crystals** in joints [1] *Individual options alone*- While each statement is true, selecting only one would be incomplete, as colchicine possesses all these properties simultaneously

Q: Which of the following drugs is useful in acute attack of gout ?

Piroxicam. ***Piroxicam*** - **Piroxicam** is a **non-steroidal anti-inflammatory drug (NSAID)**, which are the first-line treatment for acute gout attacks. - NSAIDs work by inhibiting **prostaglandin synthesis**, thereby reducing inflammation and pain associated with the acute crystal-induced arthritis. *Furosemide* - **Furosemide** is a loop diuretic that can **raise uric acid levels** by increasing reabsorption in the renal tubules. - Therefore, it would exacerbate **gout** and is contraindicated during an acute attack. *Sulfinpyrazone* - **Sulfinpyrazone** is a **uricosuric agent** used for chronic gout management to increase uric acid excretion. - It is **not used for acute attacks** as it can precipitate or worsen an attack by mobilizing uric acid crystals. *Allopurinol* - **Allopurinol** is a **xanthine oxidase inhibitor** used for long-term management of hyperuricemia and chronic gout. - Starting allopurinol during an **acute attack** can worsen or prolong the attack by causing rapid changes in serum uric acid levels.

Q: Which of the following medications is not typically used for the acute treatment of severe pain during a gout attack?

Febuxostat. ***Febuxostat*** - **Febuxostat** is a **xanthine oxidase inhibitor** used for long-term management of chronic gout by lowering uric acid levels, not for acute pain relief. - Initiating febuxostat during an acute attack can paradoxically **worsen the attack** by mobilizing urate crystals, so it's typically withheld until the acute phase resolves. *Indomethacin* - **Indomethacin** is a **non-steroidal anti-inflammatory drug (NSAID)** commonly used as a first-line treatment for acute gout attacks due to its potent anti-inflammatory effects. - It works by inhibiting prostaglandin synthesis, thereby reducing pain and inflammation associated with crystal deposition. *Colchicine* - **Colchicine** is an effective anti-inflammatory agent specifically used for acute gout attacks, particularly when initiated within **24-36 hours** of symptom onset. - It works by interfering with neutrophil migration and activity, preventing the inflammatory cascade triggered by uric acid crystals. *Corticosteroids* - **Corticosteroids**, such as prednisone or methylprednisolone, are potent anti-inflammatory agents frequently used for acute gout attacks, especially when NSAIDs or colchicine are contraindicated or ineffective. - They can be administered orally, intravenously, or via intra-articular injection to rapidly reduce pain and inflammation.

Q: Which drug is commonly used for outpatient department (OPD) analgesia?

Paracetamol. ***Paracetamol*** - It is a widely used and generally **safe analgesic** and antipyretic often prescribed for mild to moderate pain in an outpatient setting. - Its favorable side effect profile and availability as an **over-the-counter (OTC)** medication make it a first-choice drug for many common pain conditions. *Diclofenac* - While it is an effective NSAID used for pain and inflammation, its use can be associated with **gastrointestinal side effects** like ulcers and bleeding, as well as cardiovascular risks. - It is often reserved for more significant inflammatory pain or when other analgesics are insufficient, and may require more careful monitoring in an outpatient setting. *Ibuprofen* - Similar to diclofenac, Ibuprofen is an **NSAID** which is effective for pain and inflammation. However, it also carries risks of **gastrointestinal irritation** and renal side effects, especially with prolonged use or in certain patient populations. - While available OTC, its use for routine outpatient analgesia may be less preferred than paracetamol in some cases due to its GI and renal side effect profile. *Tramadol* - Tramadol is a **central acting opioid analgesic** with a higher potential for side effects such as nausea, dizziness, constipation, and the risk of dependence or abuse. - It is typically reserved for moderate to severe pain that is not adequately managed by non-opioid analgesics, and its prescription often involves more stringent monitoring than paracetamol.

Q: Which enzyme is irreversibly inhibited by aspirin?

Cyclooxygenase. ***Cyclooxygenase*** - **Aspirin** irreversibly inhibits **cyclooxygenase (COX-1 and COX-2)** by acetylating a serine residue in the enzyme's active site. - This irreversible inhibition prevents the production of **prostaglandins, thromboxane**, and **prostacyclin**, thereby reducing inflammation, pain, fever, and platelet aggregation. *Lipooxygenase* - **Lipooxygenase** is involved in the synthesis of **leukotrienes**, which are mediators of inflammation and allergic responses. - Aspirin does not directly inhibit lipooxygenase; rather, it primarily targets the COX pathway. *Thromboxane synthase* - **Thromboxane synthase** is an enzyme downstream of COX, responsible for converting prostaglandin H2 into **thromboxane A2**. - While aspirin's effect on platelet aggregation is due to reduced thromboxane A2 synthesis via COX inhibition, it does not directly inhibit thromboxane synthase itself. *Phospholipase* - **Phospholipase A2** is responsible for releasing **arachidonic acid** from cell membrane phospholipids, which is the initial step in both the cyclooxygenase and lipooxygenase pathways. - Aspirin does not directly inhibit phospholipase A2; its action occurs later in the cascade.

Q: Which drug is known to inhibit both cyclooxygenase and lipoxygenase enzymes?

BW755. ***BW755*** - **BW755** is an experimental drug that has been shown to inhibit both the **cyclooxygenase (COX)** and **lipoxygenase (LOX)** pathways. - This dual inhibition prevents the synthesis of both **prostaglandins** and **leukotrienes**, offering a broader anti-inflammatory effect. - Due to dual pathway inhibition, it has theoretical advantages over conventional NSAIDs but is not in clinical use. *Aspirin* - **Aspirin** primarily inhibits **cyclooxygenase (COX) enzymes**, leading to reduced production of **prostaglandins** and **thromboxanes**. - It does not significantly inhibit **lipoxygenase (LOX)** enzymes. - Irreversibly acetylates COX-1 and COX-2. *Indomethacin* - **Indomethacin** is a potent **non-selective COX inhibitor**, reducing the synthesis of **prostaglandins**. - Similar to aspirin, it does not exert significant inhibitory effects on the **lipoxygenase** pathway. - One of the most potent NSAIDs available. *Zileuton* - **Zileuton** is a selective **5-lipoxygenase (5-LOX) inhibitor** used in the management of **asthma**. - It reduces the synthesis of **leukotrienes** (LTC4, LTD4, LTE4) which are mediators of bronchoconstriction and inflammation. - It does **not** inhibit cyclooxygenase enzymes, making it distinct from NSAIDs.

Q: Which of the following is not an amide local anesthetic?

Cocaine. ***Cocaine*** - **Cocaine** is an **ester-type** local anesthetic, not an amide. Ester local anesthetics are characterized by an **ester bond** in their chemical structure. - It works by blocking nerve impulse transmission and also by **inhibiting norepinephrine reuptake**, contributing to its vasoconstrictive and stimulatory effects. *Lignocaine* - **Lignocaine** (also known as **lidocaine**) is an **amide-type** local anesthetic, characterized by an **amide bond** in its chemical structure. - Amide local anesthetics are generally more stable and have a longer duration of action compared to ester types. *Prilocaine* - **Prilocaine** is an **amide-type** local anesthetic, commonly used in dentistry and for regional anesthesia. - Its amide structure contributes to its stability and intermediate duration of action. *Bupivacaine* - **Bupivacaine** is an **amide-type** local anesthetic known for its relatively long duration of action and potency. - It is often used for epidural anesthesia and nerve blocks due to its prolonged effect.

Q: Which of the following substances is not classified as an opioid?

Ketamine. ***Ketamine*** - **Ketamine** is classified as a **dissociative anesthetic** and does not act on opioid receptors. - Its primary mechanism of action involves **N-methyl-D-aspartate (NMDA) receptor antagonism**. *Heroin* - **Heroin** (diacetylmorphine) is a **semisynthetic opioid** derived from morphine [1, 3]. - It rapidly crosses the **blood-brain barrier** and is metabolized to morphine, where it acts as a potent **mu-opioid receptor agonist** [3]. *Methadone* - **Methadone** is a **synthetic opioid** used in the treatment of opioid dependence and chronic pain [1, 2]. - It acts primarily as a **mu-opioid receptor agonist** with a long duration of action [1, 2]. *Fentanyl* - **Fentanyl** is a powerful **synthetic opioid** analgesic, much more potent than morphine [2]. - It selectively binds to and activates **mu-opioid receptors**, producing strong analgesic and sedative effects [2].

Q: What is the drug of choice for the treatment of acute gout in patients in whom NSAIDs are contraindicated?

Colchicine. ***Colchicine*** * **Colchicine** is a highly effective anti-inflammatory agent for acute gout flares, particularly when initiated early in the attack. * It is often the drug of choice when **NSAIDs are contraindicated** due to renal, gastrointestinal, or cardiovascular issues. *Allopurinol* * **Allopurinol** is a **xanthine oxidase inhibitor** used for long-term **gout prophylaxis** by reducing uric acid levels, not for acute attacks. * Initiating allopurinol during an acute flare can sometimes *exacerbate* the attack by transiently shifting uric acid levels. *Febuxostat* * **Febuxostat** is another **xanthine oxidase inhibitor** used for **chronic management of hyperuricemia** in gout patients, similar to allopurinol. * It is not indicated for the **acute treatment of gout** due to its mechanism of action, which focuses on reducing uric acid production over time. *Paracetamol* * **Paracetamol (acetaminophen)** is an **analgesic** and **antipyretic** but possesses very limited anti-inflammatory properties. * It is generally **ineffective** for the intense inflammatory pain and swelling characteristic of an acute gout attack.

Question 1

Which of the following statements about colchicine is/are true?

Accepted Answer

All of the options are true

Answer

Inhibits neutrophil migration

Answer

Used in the treatment of gout

Answer

Causes metaphase arrest during cell division

Question 2

What is the primary mechanism of action of opioids in pain management?

Accepted Answer

Activation of opioid receptors at both spinal and supraspinal levels

Answer

Inhibition of cyclooxygenase (COX) enzymes

Answer

Activation of opioid receptors in the spinal cord only

Answer

Activation of opioid receptors in the brain only

Question 3

Which of the following drugs is useful in acute attack of gout ?

Accepted Answer

Piroxicam

Answer

Furosemide

Answer

Sulfinpyrazone

Answer

Allopurinol

Question 4

Which of the following medications is not typically used for the acute treatment of severe pain during a gout attack?

Accepted Answer

Febuxostat

Answer

Indomethacin

Answer

Colchicine

Answer

Corticosteroids

Question 5

Which drug is commonly used for outpatient department (OPD) analgesia?

Accepted Answer

Paracetamol

Answer

Diclofenac

Answer

Ibuprofen

Answer

Tramadol

Question 6

Which enzyme is irreversibly inhibited by aspirin?

Accepted Answer

Cyclooxygenase

Answer

Lipooxygenase

Answer

Thromboxane synthase

Answer

Phospholipase

Question 7

Which drug is known to inhibit both cyclooxygenase and lipoxygenase enzymes?

Accepted Answer

BW755

Answer

Aspirin

Answer

Indomethacin

Answer

Zileuton

Question 8

Which of the following is not an amide local anesthetic?

Accepted Answer

Cocaine

Answer

Prilocaine

Answer

Bupivacaine

Answer

Lignocaine

Question 9

Which of the following substances is not classified as an opioid?

Accepted Answer

Ketamine

Answer

Heroin

Answer

Methadone

Answer

Fentanyl

Question 10

What is the drug of choice for the treatment of acute gout in patients in whom NSAIDs are contraindicated?

Accepted Answer

Colchicine

Answer

Allopurinol

Answer

Paracetamol

Answer

Febuxostat

Analgesics and Anti-inflammatory Drugs — MCQs

Analgesics and Anti-inflammatory Drugs — MCQs

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