Analgesics and Anti-inflammatory Drugs Practice Questions

Q: Which among the following is a mechanism of action of colchicine?

Anti-inflammatory action through microtubule disruption. ***Anti-inflammatory action through microtubule disruption*** - Colchicine works by binding to **tubulin**, thereby inhibiting its polymerization into microtubules. - This disruption of **microtubule formation** in neutrophils and other inflammatory cells prevents their migration and release of inflammatory mediators, thus exerting its anti-inflammatory effect [1].*Increase in uric acid excretion* - Medications that increase uric acid excretion are called **uricosurics**, such as **probenecid**. - Colchicine does not directly affect the renal excretion of uric acid [1].*Decrease in uric acid synthesis* - Medications that decrease uric acid synthesis, like **allopurinol** and **febuxostat**, inhibit the enzyme **xanthine oxidase**. - Colchicine does not inhibit xanthine oxidase and therefore does not reduce uric acid production.*None of the options* - This option is incorrect because **anti-inflammatory action through microtubule disruption** is a well-established mechanism of action for colchicine.

Q: Aspirin is used in chemoprevention of which cancer?

Colon cancer. ***Colon cancer*** - Aspirin has shown a role in **chemoprevention** for colorectal cancer, particularly in individuals with a high risk or a history of adenomas. - Its anti-inflammatory properties, specifically through **COX inhibition**, are thought to reduce tumor growth and metastasis in the colon. *Pancreatic cancer* - While some studies have explored aspirin's potential role, there is currently **insufficient evidence** to recommend it for the prevention or treatment of pancreatic cancer. - Pancreatic cancer is often diagnosed at advanced stages, and aspirin's benefits are primarily in **early prevention**. *Liver cancer* - Current research is **exploratory** regarding aspirin's role in liver cancer, primarily in **hepatocellular carcinoma (HCC)** patients. - Its use is not a standard recommendation for the management or prevention of liver cancer. *Stomach cancer* - There is **mixed and inconclusive evidence** regarding aspirin's direct benefit in stomach cancer prevention or treatment. - The primary concern with regular aspirin use in gastric conditions is the increased risk of **gastrointestinal bleeding** and ulcers.

Q: Which of the following is a pure opioid antagonist?

Naloxone. ***Naloxone*** - **Naloxone** is a pure opioid antagonist that rapidly reverses the effects of opioid agonists by competing for opioid receptor binding sites [1,2]. - It has a high affinity for μ-opioid receptors and acts as a competitive antagonist [1], making it clinically useful for treating **opioid overdose**. *Buprenorphine* - **Buprenorphine** is a **partial opioid agonist** at the μ-opioid receptor and an antagonist at the κ-opioid receptor [4]. - It can precipitate withdrawal in opioid-dependent individuals if administered while full agonists are present due to its partial agonistic activity. *Pentazocine* - **Pentazocine** is a **mixed opioid agonist-antagonist**, acting as a partial agonist or antagonist at μ-opioid receptors and an agonist at κ-opioid receptors. - Its effects can vary, including analgesia (kappa agonism) and potential for withdrawal symptoms in opioid-dependent individuals (mu antagonism). *Morphine* - **Morphine** is a potent **full opioid agonist** that primarily acts on μ-opioid receptors, producing analgesia, sedation, and euphoria [3]. - It does not block opioid receptors; instead, it activates them, leading to its therapeutic and adverse effects.

Q: Which NSAID has been traditionally and most commonly used for the treatment of acute gout?

Indomethacin. ***Indomethacin*** - Historically, **indomethacin** has been the most frequently prescribed **NSAID** for acute **gouty arthritis** due to its potent anti-inflammatory properties. - It works by inhibiting prostaglandin synthesis, thereby reducing the **inflammation** and **pain** associated with acute gout attacks. - **Note:** While still effective, current guidelines recognize that any NSAID (including naproxen, diclofenac) can be equally effective; the choice depends on patient tolerability and comorbidities. *Aspirin* - **Aspirin** at low doses can actually **raise uric acid levels** by interfering with its renal secretion, potentially exacerbating or prolonging a gout attack. - Therefore, it is generally **contraindicated** for the treatment of acute gout. *Naproxen* - **Naproxen** is an effective NSAID for acute gout with better GI tolerability compared to indomethacin [1]. - Current guidelines consider it equivalent to indomethacin, but **historically**, indomethacin was the classic first-line choice for gout. *Diclofenac* - **Diclofenac** is an NSAID that can be effectively used for acute gout with efficacy similar to other NSAIDs. - While equally effective in current practice, it is not as **historically or classically** associated with gout treatment as **indomethacin**.

Q: What is the chemical name for the drug heroin?

Diacetylmorphine. ***Diacetylmorphine*** - **Diacetylmorphine** is the chemical name for **heroin**, synthesized by acetylating **morphine**. - This chemical alteration makes it more **lipophilic**, allowing it to cross the **blood-brain barrier** more quickly and produce a more intense effect. *Morphine* - **Morphine** is a naturally occurring **opioid alkaloid** found in the **opium poppy**. - While heroin is derived from morphine, it is a chemically altered substance, not simply morphine itself. *Codeine* - **Codeine** is another naturally occurring **opioid alkaloid** in the opium poppy, but it is less potent than morphine. - It is often used as a **cough suppressant** and for mild to moderate pain relief. *Opium* - **Opium** is the dried latex obtained from the opium poppy (**Papaver somniferum**), containing various alkaloids, including **morphine** and **codeine**. - It is not a single chemical compound but a mixture of substances from which opioids are derived.

Q: Which opioid drug is effectively administered via the transbuccal route?

Fentanyl. ***Fentanyl*** - **Fentanyl** is a potent, **lipophilic opioid** that is well-absorbed through mucous membranes, making it suitable for **transbuccal administration**. - Its high potency and rapid onset of action when administered transbuccally make it useful for breakthrough pain or rapid analgesia. *Sulfentanil* - While also a potent opioid, **sulfentanil** is primarily used intravenously for anesthesia and is not commonly formulated or administered via the transbuccal route. - Its chemical properties and pharmacokinetic profile do not lend themselves as readily to transbuccal absorption compared to fentanyl for practical clinical use. *Remifentanil* - **Remifentanil** is an **ultra-short-acting opioid** metabolized by plasma esterases, making it ideal for continuous intravenous infusions where rapid offset is desired. - Its rapid metabolism and specific pharmacokinetic properties make it unsuitable for transbuccal extended release or sustained absorption. *Alfentanil* - **Alfentanil** is a short-acting opioid predominantly used intravenously for induction and maintenance of anesthesia. - Although it has a rapid onset, it is not optimized or commonly utilized for transbuccal administration due to its lower lipophilicity and different absorption characteristics compared to fentanyl.

Q: A 75-year-old man with chronic kidney disease presents with worsening dyspnea and lower extremity edema. Which class of drugs should be used cautiously in this patient?

NSAIDs. ***NSAIDs*** - **NSAIDs** can cause **acute kidney injury** by inhibiting prostaglandin synthesis, which leads to **afferent arteriolar vasoconstriction** and reduced renal blood flow. This effect is exaggerated in patients with **pre-existing chronic kidney disease**. - They also can exacerbate **fluid retention** and worsen **edema** and symptoms of **heart failure**, which is particularly problematic in a patient with dyspnea and lower extremity edema. *ACE inhibitors* - While generally beneficial in CKD to slow progression, **ACE inhibitors** can cause **acute kidney injury** in patients with **renal artery stenosis** or severe volume depletion due to efferent arteriolar vasodilation. - They can also lead to **hyperkalemia**, which requires monitoring, but they are not contraindicated in this patient's presentation per se. *Beta-blockers* - **Beta-blockers** are often prescribed for cardiovascular conditions common in CKD patients, such as **hypertension** and **heart failure**, and are generally safe in CKD with appropriate dosing. - While some beta-blockers are renally excreted, their primary mechanism does not directly worsen kidney function or fluid retention in the same way NSAIDs do. *Diuretics* - **Diuretics** are essential in managing fluid overload, dyspnea, and edema in patients with **chronic kidney disease** and heart failure. - Although loop diuretics may be less effective with reduced kidney function and higher doses might be needed, they are not typically used cautiously; rather, they are a cornerstone of treatment for these symptoms.

Question 1

Which among the following is a mechanism of action of colchicine?

Accepted Answer

Anti-inflammatory action through microtubule disruption

Answer

Decrease in uric acid synthesis

Answer

None of the options

Answer

Increase in uric acid excretion

Question 2

Aspirin is used in chemoprevention of which cancer?

Accepted Answer

Colon cancer

Answer

Pancreatic cancer

Answer

Liver cancer

Answer

Stomach cancer

Question 3

Which of the following is a pure opioid antagonist?

Accepted Answer

Naloxone

Answer

Buprenorphine

Answer

Pentazocine

Answer

Morphine

Question 4

Which NSAID has been traditionally and most commonly used for the treatment of acute gout?

Accepted Answer

Indomethacin

Answer

Aspirin

Answer

Naproxen

Answer

Diclofenac

Question 5

What is the chemical name for the drug heroin?

Accepted Answer

Diacetylmorphine

Answer

Morphine

Answer

Codeine

Answer

Opium

Question 6

Which opioid drug is effectively administered via the transbuccal route?

Accepted Answer

Fentanyl

Answer

Sulfentanil

Answer

Remifentanil

Answer

Alfentanil

Question 7

A 75-year-old man with chronic kidney disease presents with worsening dyspnea and lower extremity edema. Which class of drugs should be used cautiously in this patient?

Accepted Answer

NSAIDs

Answer

Beta-blockers

Answer

Diuretics

Answer

ACE inhibitors

Analgesics and Anti-inflammatory Drugs — MCQs

Analgesics and Anti-inflammatory Drugs — MCQs

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