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ABFM Pain Medicine study materials
ABFM Pain Medicine study resources

ABFM Pain Medicine practice questions

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Question 1Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A patient describes burning, electric-shock pain in the feet with reduced pinprick sensation. This presentation most directly suggests which pain mechanism?

  1. Neuropathic pain from somatosensory system injury Correct answer.
  2. Nociplastic pain without demonstrable sensory change
  3. Referred visceral pain from pelvic disease
  4. Nociceptive pain from ongoing tissue damage

Explanation

Neuropathic pain is defined as pain caused by a lesion or disease of the somatosensory nervous system, and burning or electric quality with sensory deficit supports this mechanism. Nociceptive pain arises from actual or threatened tissue damage and is usually aching or pressure-like without sensory loss. Nociplastic pain involves altered nociception without a clear somatosensory lesion, and visceral referred pain is felt remote from an organ but does not produce a dermatomal sensory deficit.

Question 2Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Which statement best describes the 0-to-10 numeric rating scale (NRS) for pain intensity?

  1. It is scored by summing fifteen sensory and affective pain descriptors.
  2. It measures pain interference across seven functional domains.
  3. It is a single-item measure of pain intensity validated in adults. Correct answer.
  4. It requires the patient to choose a facial expression matching their pain.

Explanation

The NRS asks the patient to rate pain intensity on an 11-point scale from 0 to 10 and is widely validated in adults. It captures intensity only and does not measure functional interference or pain quality. Facial scales and descriptor-based questionnaires serve different assessment purposes.

Question 3Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

For which patient group is the Faces Pain Scale-Revised most specifically validated?

  1. Older adults with advanced dementia
  2. Patients with locked-in syndrome
  3. Adults with chronic low back pain
  4. Children about 4 to 12 years Correct answer.

Explanation

The Faces Pain Scale-Revised uses drawn faces and is validated for self-report of pain in children, generally around 4 to 12 years of age. It requires the patient to understand and indicate a matching face. Adults usually use numeric or visual analog scales, while nonverbal patients with dementia require observational tools.

Question 4Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A patient reports that normally nonpainful light touch from clothing now produces pain. This phenomenon is called:

  1. Allodynia Correct answer.
  2. Dysesthesia
  3. Hyperalgesia
  4. Hyperpathia

Explanation

Allodynia is pain due to a stimulus that does not normally provoke pain, such as light touch from clothing. Hyperalgesia is increased pain from a normally painful stimulus. Dysesthesia is an unpleasant abnormal sensation, and hyperpathia is an exaggerated response to stimulation, especially repetitive stimulation.

Question 5Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Which pain assessment tool is designed for young children or nonverbal patients using facial expression, leg movement, activity, crying, and consolability?

  1. DN4
  2. Pain Catastrophizing Scale
  3. FLACC Correct answer.
  4. Oswestry Disability Index

Explanation

FLACC is an observational scale scoring Face, Legs, Activity, Cry, and Consolability, and it is used when patients cannot reliably self-report pain. The DN4 screens for neuropathic pain, the Oswestry index measures back-related disability, and the Pain Catastrophizing Scale measures catastrophic thinking.

Question 6Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Which set of pain descriptors most strongly raises suspicion for a neuropathic component?

  1. Cramping, colicky, and waxing-waning
  2. Throbbing, pressure-like, and pulsating
  3. Dull, aching, and cramping
  4. Burning, shooting, and electric-shock-like Correct answer.

Explanation

Burning, shooting, and electric-shock-like qualities are classic neuropathic descriptors that reflect somatosensory nerve dysfunction. Dull aching or throbbing pressure-like pain is more typical of nociceptive sources. Colicky waxing-waning pain suggests a visceral or smooth-muscle process.

Question 7Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A multidimensional pain assessment is best characterized by which approach?

  1. Obtaining a single diagnostic nerve block result
  2. Recording only the pain intensity score at each visit
  3. Measuring serum inflammatory markers alone
  4. Assessing biologic, psychological, and social factors Correct answer.

Explanation

Multidimensional pain assessment evaluates biomedical, psychological, and social contributors because pain experience and disability are shaped by all three domains. A single intensity score or laboratory marker cannot capture this complexity. Diagnostic blocks answer a narrow mechanistic question and do not replace a comprehensive assessment.

Question 8Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The Oswestry Disability Index is primarily used to assess which domain in patients with low back pain?

  1. Pain-related functional disability Correct answer.
  2. Symptom severity of fibromyalgia
  3. Pain catastrophizing
  4. Neuropathic pain quality

Explanation

The Oswestry Disability Index quantifies how low back pain interferes with activities of daily living and function. It is not a neuropathic screening tool, a catastrophizing measure, or a fibromyalgia severity scale. Functional disability is distinct from pain intensity and helps guide rehabilitation planning.

Question 9Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The McGill Pain Questionnaire is designed primarily to measure which aspects of pain?

  1. Sensory and affective qualities plus overall intensity Correct answer.
  2. Opioid misuse risk before prescribing
  3. Functional capacity during six-minute walk testing
  4. Only current pain intensity on a 0-to-10 scale

Explanation

The McGill Pain Questionnaire uses verbal descriptors to capture sensory and affective dimensions of pain as well as overall intensity. It is not a simple numeric intensity rating, a functional performance test, or an opioid risk tool. Its descriptor groups help characterize pain quality.

Question 10Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The Brief Pain Inventory assesses which pair of domains?

  1. Pain intensity and functional interference Correct answer.
  2. Depression severity and anxiety severity
  3. Opioid craving and withdrawal symptoms
  4. Neuropathic signs and autonomic dysfunction

Explanation

The Brief Pain Inventory measures pain intensity and the degree to which pain interferes with mood, activity, sleep, and other functions. This combination makes it useful for capturing burden beyond a single intensity score. It does not diagnose neuropathic mechanisms or screen for opioid misuse.

Question 11Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A patient with chronic pain scores high on the Pain Catastrophizing Scale. This score most directly indicates:

  1. Undertreated nociceptive tissue damage
  2. A confirmed neuropathic pain mechanism
  3. Rumination, magnification, and helplessness about pain Correct answer.
  4. A high likelihood of malingering

Explanation

The Pain Catastrophizing Scale measures catastrophic thinking, specifically rumination, magnification, and helplessness related to pain. High scores identify a psychological contributor to pain-related distress and disability. They do not prove malingering, tissue damage, or a neuropathic mechanism.

Question 12Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The DN4 questionnaire is used to help identify which condition?

  1. Fibromyalgia
  2. Complex regional pain syndrome type I
  3. Neuropathic pain Correct answer.
  4. Migraine with aura

Explanation

The DN4 combines neuropathic pain descriptors with bedside sensory findings such as hypoesthesia and allodynia to screen for neuropathic pain. A score of 4 or more suggests a neuropathic component but does not by itself establish the diagnosis. It is not a specific test for fibromyalgia, migraine, or complex regional pain syndrome.

Question 13Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Conditioned pain modulation (CPM) is best described as:

  1. Reduced test pain during a concurrent noxious conditioning stimulus Correct answer.
  2. The placebo analgesic response produced by a sham injection
  3. The spread of pain to contralateral dermatomes after nerve injury
  4. An increase in pain sensitivity after repeated identical stimuli

Explanation

Conditioned pain modulation refers to the phenomenon in which a painful conditioning stimulus reduces the pain response to a separate test stimulus, often summarized as pain inhibiting pain. It is a measure of endogenous descending modulation. Temporal summation, contralateral spread, and placebo responses are different constructs.

Question 14Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Temporal summation in pain testing refers to:

  1. Increasing pain during repeated noxious stimuli of constant intensity Correct answer.
  2. Reduction of pain during a concurrent remote noxious stimulus
  3. Pain evoked by light touch after nerve injury
  4. Loss of pinprick sensation in a stocking distribution

Explanation

Temporal summation is the progressive increase in perceived pain when repeated noxious stimuli are delivered at a constant intensity. It is often used as a psychophysical index of central sensitization. Reduction of pain during a remote stimulus is conditioned pain modulation, while light-touch pain is allodynia.

Question 15Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The Central Sensitization Inventory is best used to:

  1. Grade radicular compression on MRI
  2. Measure opioid withdrawal severity
  3. Quantify symptoms of central sensitization syndromes Correct answer.
  4. Confirm a diagnosis of diabetic peripheral neuropathy

Explanation

The Central Sensitization Inventory quantifies symptoms associated with central sensitization and centralized pain syndromes. It is a symptom inventory, not a confirmatory diagnostic test for a specific neuropathy. It does not measure withdrawal or grade nerve compression.

Question 16Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

In the 2010/2011 fibromyalgia diagnostic criteria, the Widespread Pain Index and Symptom Severity scale are used to:

  1. Screen for opioid use disorder
  2. Classify fibromyalgia without requiring tender point examination Correct answer.
  3. Measure neuropathic pain intensity after nerve block
  4. Replace the clinical diagnosis with an MRI finding

Explanation

The Widespread Pain Index and Symptom Severity scale allow classification of fibromyalgia based on pain distribution and symptom burden without a tender point count. They are clinical criteria rather than imaging or nerve block measures. Opioid use disorder requires separate screening.

Question 17Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A patient reports pain intensity of 8/10 but remains employed and sleeps well. Which additional measure is most useful to capture the overall burden of pain?

  1. A repeat pain intensity score at rest
  2. A serum C-reactive protein level
  3. A numeric rating of the worst pain ever
  4. A pain interference or disability measure Correct answer.

Explanation

Pain interference and disability measures capture how pain affects function, mood, sleep, and participation, which intensity alone cannot show. A patient may report high intensity while maintaining substantial function or may report lower intensity with major disability. Repeat intensity ratings and inflammatory markers do not capture this functional burden.

Question 18Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The painDETECT questionnaire was developed primarily to:

  1. Assess delirium in hospitalized older adults
  2. Screen for a neuropathic component in chronic pain Correct answer.
  3. Diagnose fibromyalgia by counting tender points
  4. Predict response to epidural steroid injection

Explanation

painDETECT uses pain descriptors and patterns to screen for a neuropathic pain component in patients with chronic pain. It supports clinical suspicion but does not replace examination or diagnostic testing. It is unrelated to tender point counting, delirium assessment, or predicting epidural steroid response.

Question 19Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Somatic referred pain is best described as:

  1. Pain felt remote from its source with regional tenderness Correct answer.
  2. Pain produced by a placebo stimulus
  3. Pain arising from visceral disease and felt in a remote area
  4. Pain caused by a nerve root lesion in a dermatomal distribution

Explanation

Somatic referred pain is perceived remote from its musculoskeletal source and is often accompanied by regional tenderness, but it does not follow a strict dermatomal pattern. Radicular pain follows a nerve root dermatome, and visceral referred pain arises from an internal organ. Placebo-related pain is a separate phenomenon.

Question 20Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Which finding most strongly suggests radicular pain rather than somatic referred pain?

  1. Pain described as deep and aching in the buttock
  2. Pain that is diffuse and difficult to localize
  3. Pain reproduced by nerve root tension testing Correct answer.
  4. Pain worsened by prolonged standing only

Explanation

Radicular pain follows a nerve root distribution and may be reproduced by tension tests such as straight leg raise or Spurling maneuver. Somatic referred pain is typically deep, aching, diffuse, and harder to localize. Positional worsening alone is nonspecific.

Question 21Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The PAINAD scale is used to assess pain in which population?

  1. Children younger than two years
  2. Athletes with acute muscle strain
  3. Patients undergoing diagnostic nerve blocks
  4. Advanced dementia with inability to self-report Correct answer.

Explanation

PAINAD is an observational scale for pain in people with advanced dementia who cannot reliably self-report. It scores breathing, negative vocalization, facial expression, body language, and consolability. It is not a pediatric, sports medicine, or procedural block assessment tool.

Question 22Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Which statement about quantitative sensory testing (QST) is most accurate?

  1. It confirms malingering when thresholds are abnormal
  2. It directly measures tissue injury and replaces imaging
  3. It measures sensory pathway function and requires normative data Correct answer.
  4. It is a self-report questionnaire scored from 0 to 10

Explanation

Quantitative sensory testing is a psychophysical method that measures detection and pain thresholds to standardized stimuli, reflecting sensory pathway function rather than tissue anatomy. It requires standardized instructions, calibrated equipment, and normative reference data. Abnormal thresholds indicate altered sensory processing and do not prove malingering.

Question 23Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Which set of findings best fits the Budapest criteria for complex regional pain syndrome?

  1. Diffuse pain, no sensory change, and normal sympathetic function
  2. Disproportionate continuing pain with sensory, vasomotor, sudomotor, and motor signs Correct answer.
  3. Widespread pain with 11 tender points and normal neurologic exam
  4. Dermatomal burning pain with MRI-confirmed nerve root compression

Explanation

The Budapest criteria require continuing pain disproportionate to an inciting event, with at least one symptom in two or more categories and at least one sign in two or more categories, including sensory, vasomotor, sudomotor, and motor or trophic changes. Another diagnosis must not better explain the findings. Dermatomal pain from root compression and widespread tender-point pain suggest different conditions.

Question 24Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

In the grading system for neuropathic pain, 'probable' neuropathic pain requires:

  1. A response to a diagnostic sympathetic block
  2. Only a patient-reported burning descriptor
  3. Neuropathic history plus sensory signs in a plausible distribution Correct answer.
  4. A confirmed nerve biopsy or genetic test in every case

Explanation

The neuropathic pain grading system defines possible neuropathic pain by history alone, probable neuropathic pain by history plus clinical sensory signs in a plausible distribution, and definite neuropathic pain by adding a confirmatory test. A burning descriptor alone is insufficient, and confirmatory testing is not mandatory for the probable category.

Question 25Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A patient reports complete relief after a diagnostic medial branch block, but also reports similar relief after a saline injection. What is the best interpretation?

  1. The result is nonspecific and may reflect a placebo response Correct answer.
  2. Saline should never be used in diagnostic blocks
  3. The block proves the medial branch is the pain generator
  4. The patient is deliberately exaggerating symptoms

Explanation

Relief after both active and saline injections suggests a nonspecific or placebo response, so the block cannot be used alone to confirm the pain generator. Diagnostic blocks are more informative when performed with controlled or comparative designs. A placebo response is not evidence of deliberate exaggeration.

Question 26Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A 45-year-old man with acute low back pain is asked to rate his pain on a scale from 0 to 10, where 0 is no pain and 10 is the worst pain imaginable. This instrument is best characterized as which of the following?

  1. An 11-point self-report measure of pain intensity Correct answer.
  2. A clinician-rated observational measure of pain behavior
  3. A questionnaire that quantifies pain-related disability
  4. A multidimensional profile of sensory and affective pain

Explanation

The numeric rating scale is a unidimensional self-report measure of pain intensity scored from 0 to 10. It is quick and widely used but does not capture function, affect, or qualitative pain features.

Question 27Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The FLACC scale is designed primarily for which patient population?

  1. Older adults with advanced dementia
  2. Adolescents with chronic widespread pain
  3. Adults in the intensive care unit who are sedated
  4. Children between 2 months and 7 years of age Correct answer.

Explanation

FLACC stands for Face, Legs, Activity, Cry, and Consolability and is an observational tool validated for children aged 2 months to 7 years. It is used when children cannot reliably self-report pain.

Question 28Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A 38-year-old woman has chronic abdominal pain. On examination, tenderness over the abdominal wall persists and worsens when she lifts her head and tenses the abdominal muscles. This finding most strongly suggests which source of pain?

  1. Visceral abdominal pain
  2. Referred pain from the thoracic spine
  3. Peritoneal irritation
  4. Abdominal wall pain Correct answer.

Explanation

A positive Carnett sign-tenderness that persists or increases with abdominal wall tension-points to a somatic abdominal wall source rather than visceral disease. It helps guide evaluation away from intra-abdominal pathology.

Question 29Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A 52-year-old woman with chronic low back pain reports two weeks of anhedonia, poor sleep, and low energy. Which instrument most directly measures the severity of her depressive symptoms?

  1. GAD-7
  2. AUDIT-C
  3. PHQ-9 Correct answer.
  4. PC-PTSD-5

Explanation

The PHQ-9 is a nine-item self-report scale that scores the presence and severity of depressive symptoms. It is commonly used in pain settings because depression frequently coexists with chronic pain.

Question 30Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A 60-year-old man with chronic low back pain says he lacks confidence to walk, lift, or socialize because of his pain, even though his physician finds no progressive neurologic deficit. Which questionnaire most directly measures this construct?

  1. McGill Pain Questionnaire (MPQ)
  2. Pain Self-Efficacy Questionnaire Correct answer.
  3. Tampa Scale for Kinesiophobia (TSK)
  4. Pain Disability Index (PDI)

Explanation

The Pain Self-Efficacy Questionnaire assesses a patient's confidence in performing activities despite pain. Low self-efficacy is a modifiable psychosocial factor in chronic pain rehabilitation.

Question 31Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A 47-year-old man with low back pain shows widespread nonanatomic superficial tenderness and reports pain during simulated axial loading and rotation. These findings are best interpreted as which of the following?

  1. Characteristic features of ankylosing spondylitis
  2. Definitive evidence of lumbar nerve root compression
  3. Nonorganic signs suggesting distress Correct answer.
  4. Indications for urgent surgical decompression

Explanation

These are Waddell nonorganic signs, which reflect illness behavior and distress rather than structural pathology. They should not be used to label pain as fake, but they support a broader biopsychosocial evaluation.

Question 32Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A 41-year-old woman has low back pain radiating into the left leg. With the right leg raised straight, she reports reproduction of her left leg pain at 40 degrees. This finding is most consistent with which condition?

  1. Hip osteoarthritis
  2. Lumbar spinal stenosis
  3. Sacroiliac joint dysfunction
  4. Lumbar disc herniation Correct answer.

Explanation

A positive crossed straight leg raise-contralateral leg pain reproduced by raising the unaffected leg-is highly specific for lumbar disc herniation with nerve root irritation. It is less sensitive than the ipsilateral straight leg raise.

Question 33Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

At a follow-up visit, a patient with chronic pain states that she feels 'much better overall' and asks to have this recorded. Which instrument best captures this global change?

  1. Patient Global Impression of Change Correct answer.
  2. Pain Disability Index
  3. Brief Pain Inventory
  4. Numeric Rating Scale

Explanation

The Patient Global Impression of Change is a single-item measure that asks patients to rate overall improvement or worsening since starting treatment. It captures the patient's own judgment of meaningful change.

Question 34Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

Which headache feature most strongly warrants urgent neuroimaging?

  1. Headache occurring during the week of menses
  2. Headache that resolves with sumatriptan
  3. New headache with fever and neck stiffness Correct answer.
  4. Bilateral throbbing headache with photophobia for 10 years

Explanation

Fever with neck stiffness and a new headache raises concern for meningitis or another serious secondary cause and requires urgent evaluation. Red-flag headache features include systemic symptoms, neurologic deficits, sudden onset, older age at onset, and pattern change.

Question 35Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

On examination, a therapist finds a taut band in the upper trapezius with a hypersensitive spot that reproduces the patient's usual headache when palpated. This finding is best described as which of the following?

  1. A fibromyalgia tender point
  2. A neuroma
  3. An enthesopathy
  4. A myofascial trigger point Correct answer.

Explanation

A myofascial trigger point is a hyperirritable spot within a taut band that produces local and referred pain when palpated. Reproduction of the patient's typical pain is a key diagnostic feature.

Question 36Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A physician is considering long-term opioid therapy for a patient with chronic musculoskeletal pain. Which instrument is designed to estimate the risk of aberrant opioid-related behavior before treatment begins?

  1. CAGE questionnaire
  2. Epworth Sleepiness Scale
  3. PHQ-9
  4. Opioid Risk Tool Correct answer.

Explanation

The Opioid Risk Tool is a brief screening instrument that estimates a patient's risk of aberrant drug-related behavior before starting opioid therapy. It incorporates personal and family history and age.

Question 37Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

The PROMIS Pain Interference short form is designed to measure which domain?

  1. Interference of pain with daily activities Correct answer.
  2. Worst pain intensity during the past 24 hours
  3. Number of pain flares per week
  4. Sensory qualities of neuropathic pain

Explanation

Pain interference refers to the extent to which pain limits physical, social, and emotional functioning. The PROMIS Pain Interference measure captures this functional impact rather than intensity alone.

Question 38Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A patient with burning feet and normal nerve conduction studies is suspected of having small fiber neuropathy. Which test most directly assesses intraepidermal nerve fiber density?

  1. Skin punch biopsy Correct answer.
  2. Needle electromyography
  3. Lumbar spine MRI
  4. Infrared thermography

Explanation

Skin punch biopsy with quantification of intraepidermal nerve fiber density is a direct morphological test for small fiber neuropathy. It can be abnormal when large-fiber nerve conduction studies are normal.

Question 39Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

According to the International Association for the Study of Pain definition, which statement best characterizes pain?

  1. Pain is a purely psychological experience without biologic correlates
  2. Pain is a synonym for nociception
  3. Pain is always proportional to the degree of tissue damage
  4. Pain and nociception are distinct phenomena Correct answer.

Explanation

The IASP definition emphasizes that pain is a subjective experience influenced by biologic, psychological, and social factors. Nociception is the neural process of encoding noxious stimuli, whereas pain is the patient's experience.

Question 40Pain assessment, diagnosis, and multidimensional evaluation (unverified: not enumerated in source)

A 34-year-old man has a complete T6 spinal cord injury. He reports severe burning pain below the level of injury with allodynia. This pain is best classified as which of the following?

  1. Nociceptive pain
  2. Nociplastic pain
  3. Peripheral neuropathic pain
  4. Central neuropathic pain Correct answer.

Explanation

Pain caused by a lesion of the central nervous system, such as spinal cord injury, is classified as central neuropathic pain. It often occurs below the injury level and may include allodynia.

Question 41Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

For a healthy adult without liver disease, what is the generally recommended maximum daily dose of acetaminophen?

  1. 2,000 mg
  2. 3,000 mg
  3. 6,000 mg
  4. 4,000 mg Correct answer.

Explanation

The accepted ceiling for most healthy adults is 4,000 mg per day from all sources. Lower limits are used for patients with chronic alcohol use, liver disease, or frailty because of hepatotoxicity risk.

Question 42Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

The analgesic and anti-inflammatory effects of ibuprofen are primarily produced by which mechanism?

  1. Inhibition of serotonin reuptake
  2. Inhibition of cyclooxygenase enzymes Correct answer.
  3. Blockade of voltage-gated sodium channels
  4. Direct activation of mu-opioid receptors

Explanation

Ibuprofen is a nonselective NSAID that inhibits COX-1 and COX-2, reducing prostaglandin synthesis. This accounts for both analgesia and anti-inflammatory activity, as well as gastrointestinal and renal adverse effects.

Question 43Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

Which approach is most appropriate when initiating long-term opioid therapy for chronic noncancer pain in an opioid-naive adult?

  1. Begin low-dose immediate-release opioid and titrate Correct answer.
  2. Start transdermal fentanyl 25 mcg/h for continuous relief
  3. Start methadone 20 mg daily for chronic pain
  4. Start extended-release morphine 30 mg twice daily for baseline pain

Explanation

Opioid-naive patients should begin with a low dose of an immediate-release agent and be titrated slowly according to response and adverse effects. Extended-release and transdermal products are generally reserved for opioid-tolerant patients or specific clinical situations.

Question 44Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

Which medication is the first-line antidote for suspected opioid overdose with respiratory depression?

  1. Glucagon
  2. Atropine
  3. Naloxone Correct answer.
  4. Flumazenil

Explanation

Naloxone is a competitive opioid receptor antagonist that rapidly reverses opioid-induced respiratory depression and sedation. Repeat doses or an infusion may be needed because naloxone has a shorter duration than many opioids.

Question 45Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

Which morphine metabolite accumulates in renal impairment and can cause prolonged sedation and respiratory depression?

  1. Nortriptyline, a tricyclic antidepressant
  2. Morphine-6-glucuronide Correct answer.
  3. 6-acetylmorphine, a heroin metabolite
  4. Normeperidine, a meperidine metabolite

Explanation

Morphine is metabolized to morphine-6-glucuronide, which is renally cleared and pharmacologically active. In renal failure it can accumulate and produce delayed or prolonged opioid toxicity.

Question 46Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

Which adverse effect is most associated with tramadol because of its serotonergic activity?

  1. Renal tubular acidosis with metabolic acidosis
  2. Acute pancreatitis with epigastric pain
  3. Serotonin syndrome with SSRI coadministration Correct answer.
  4. Aplastic anemia with pancytopenia

Explanation

Tramadol inhibits serotonin and norepinephrine reuptake, so combining it with other serotonergic drugs can precipitate serotonin syndrome. It also lowers the seizure threshold and can cause seizures.

Question 47Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

Which monitoring is most important when methadone is initiated at higher doses for chronic pain?

  1. Routine serum amylase for pancreatic injury
  2. Annual bone density scanning for osteoporosis
  3. Monthly liver biopsy to assess fibrosis
  4. Electrocardiograms to monitor the QT interval Correct answer.

Explanation

Methadone can prolong the QT interval and cause torsades de pointes, especially at higher doses or with interacting drugs. Baseline and follow-up ECGs help identify patients who require dose reduction or avoidance.

Question 48Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

A transdermal fentanyl patch is being considered for chronic pain. Which patient is appropriate for this formulation?

  1. A patient with intermittent migraine
  2. A patient with acute postoperative pain
  3. An opioid-naive patient with moderate osteoarthritis pain
  4. An opioid-tolerant patient with persistent severe pain Correct answer.

Explanation

Transdermal fentanyl is reserved for opioid-tolerant patients with persistent severe pain that requires continuous opioid therapy. It is not appropriate for acute pain, intermittent pain, or opioid-naive patients.

Question 49Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

Which property of buprenorphine explains its ceiling effect on respiratory depression?

  1. Partial mu-opioid receptor agonism Correct answer.
  2. Full kappa-opioid receptor agonism
  3. Voltage-gated sodium channel blockade
  4. Irreversible cyclooxygenase inhibition

Explanation

Buprenorphine is a partial agonist at the mu-opioid receptor with high affinity but limited intrinsic activity. As dose increases, respiratory depression tends to plateau rather than rise indefinitely as with full agonists.

Question 50Pharmacologic management of pain, including opioid and non-opioid therapy (unverified: not enumerated in source)

A breastfeeding mother taking codeine develops excessive sedation and respiratory depression in her infant. Which pharmacogenetic explanation is most likely?

  1. CYP2C9 poor metabolism producing less active drug
  2. CYP3A4 inhibition producing more parent codeine
  3. CYP2D6 ultrarapid metabolism producing more morphine Correct answer.
  4. UGT2B7 ultrarapid glucuronidation producing more codeine

Explanation

Codeine is a prodrug converted by CYP2D6 to morphine. Ultrarapid metabolizers convert more codeine to morphine, increasing the risk of infant opioid toxicity during breastfeeding.